diff --git a/cpp11/define.hpp b/cpp11/define.hpp
index b29eb600..0f09c3aa 100644
--- a/cpp11/define.hpp
+++ b/cpp11/define.hpp
@@ -121,7 +121,7 @@ struct define {
 	void msgpack_object(msgpack::object* o, msgpack::zone* z) const
 	{
 		o->type = type::ARRAY;
-		o->via.array.ptr = static_cast<object*>(z->malloc(sizeof(object)*sizeof...(Args)));
+		o->via.array.ptr = static_cast<object*>(z->allocate_align(sizeof(object)*sizeof...(Args)));
 		o->via.array.size = sizeof...(Args);
 
 		define_imp<tuple<Args&...>, sizeof...(Args)>::object(o, z, a);
diff --git a/cpp11/tuple.hpp b/cpp11/tuple.hpp
index 54724489..a747a759 100644
--- a/cpp11/tuple.hpp
+++ b/cpp11/tuple.hpp
@@ -189,7 +189,7 @@ inline void operator<< (
 		object::with_zone& o,
 		type::tuple<Args...>& v) {
 	o.type = type::ARRAY;
-	o.via.array.ptr = static_cast<object*>(o.zone->malloc(sizeof(object)*sizeof...(Args)));
+	o.via.array.ptr = static_cast<object*>(o.zone->allocate_align(sizeof(object)*sizeof...(Args)));
 	o.via.array.size = sizeof...(Args);
 	TupleToObjectWithZone<decltype(v), sizeof...(Args)>::convert(o, v);
 }
diff --git a/cpp11/zone.hpp b/cpp11/zone.hpp
index 07fd678b..c86a3304 100644
--- a/cpp11/zone.hpp
+++ b/cpp11/zone.hpp
@@ -155,8 +155,8 @@ public:
 public:
 	static zone* create(size_t chunk_size);
 	static void destroy(zone* zone);
-	void* malloc(size_t size);
-	void* malloc_no_align(size_t size);
+	void* allocate_align(size_t size);
+	void* allocate_no_align(size_t size);
 
 	void push_finalizer(void (*func)(void*), void* data);
 
@@ -172,12 +172,12 @@ public:
 	T* allocate(Args... args);
 
 private:
-	void undo_malloc(size_t size);
+	void undo_allocate(size_t size);
 
 	template <typename T>
 	static void object_destructor(void* obj);
 
-	void* malloc_expand(size_t size);
+	void* allocate_expand(size_t size);
 };
 
 inline zone* zone::create(size_t chunk_size)
@@ -200,16 +200,16 @@ inline zone::zone(size_t chunk_size) noexcept:chunk_size_(chunk_size), chunk_lis
 {
 }
 
-inline void* zone::malloc(size_t size)
+inline void* zone::allocate_align(size_t size)
 {
-	return malloc_no_align(
+	return allocate_no_align(
 		((size)+((MSGPACK_ZONE_ALIGN)-1)) & ~((MSGPACK_ZONE_ALIGN)-1));
 }
 
-inline void* zone::malloc_no_align(size_t size)
+inline void* zone::allocate_no_align(size_t size)
 {
 	if(chunk_list_.free_ < size) {
-		return malloc_expand(size);
+		return allocate_expand(size);
 	}
 
 	char* ptr = chunk_list_.ptr_;
@@ -219,7 +219,7 @@ inline void* zone::malloc_no_align(size_t size)
 	return ptr;
 }
 
-inline void* zone::malloc_expand(size_t size)
+inline void* zone::allocate_expand(size_t size)
 {
 	chunk_list* const cl = &chunk_list_;
 
@@ -270,7 +270,7 @@ void zone::object_destructor(void* obj)
 	reinterpret_cast<T*>(obj)->~T();
 }
 
-inline void zone::undo_malloc(size_t size)
+inline void zone::undo_allocate(size_t size)
 {
 	chunk_list_.ptr_  -= size;
 	chunk_list_.free_ += size;
@@ -280,18 +280,18 @@ inline void zone::undo_malloc(size_t size)
 template <typename T, typename... Args>
 T* zone::allocate(Args... args)
 {
-	void* x = malloc(sizeof(T));
+	void* x = allocate_align(sizeof(T));
 	try {
 		finalizer_array_.push(&zone::object_destructor<T>, x);
 	} catch (...) {
-		undo_malloc(sizeof(T));
+		undo_allocate(sizeof(T));
 		throw;
 	}
 	try {
 		return new (x) T(args...);
 	} catch (...) {
 		--finalizer_array_.tail_;
-		undo_malloc(sizeof(T));
+		undo_allocate(sizeof(T));
 		throw;
 	}
 }
diff --git a/src/msgpack/type/define.hpp.erb b/src/msgpack/type/define.hpp.erb
index 8a234256..fc233969 100644
--- a/src/msgpack/type/define.hpp.erb
+++ b/src/msgpack/type/define.hpp.erb
@@ -118,7 +118,7 @@ struct define<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>> {
 	void msgpack_object(msgpack::object* o, msgpack::zone* z) const
 	{
 		o->type = type::ARRAY;
-		o->via.array.ptr = static_cast<object*>(z->malloc(sizeof(object)*<%=i+1%>));
+		o->via.array.ptr = static_cast<object*>(z->allocate_align(sizeof(object)*<%=i+1%>));
 		o->via.array.size = <%=i+1%>;
 		<%0.upto(i) {|j|%>
 		o->via.array.ptr[<%=j%>] = object(a<%=j%>, z);<%}%>
diff --git a/src/msgpack/type/deque.hpp b/src/msgpack/type/deque.hpp
index b3895f70..be5ad8a4 100644
--- a/src/msgpack/type/deque.hpp
+++ b/src/msgpack/type/deque.hpp
@@ -57,7 +57,7 @@ inline void operator<< (object::with_zone& o, const std::deque<T>& v)
 		o.via.array.ptr = nullptr;
 		o.via.array.size = 0;
 	} else {
-		object* p = static_cast<object*>(o.zone->malloc(sizeof(object)*v.size()));
+		object* p = static_cast<object*>(o.zone->allocate_align(sizeof(object)*v.size()));
 		object* const pend = p + v.size();
 		o.via.array.ptr = p;
 		o.via.array.size = v.size();
diff --git a/src/msgpack/type/list.hpp b/src/msgpack/type/list.hpp
index 03ae9d15..f3ac18ba 100644
--- a/src/msgpack/type/list.hpp
+++ b/src/msgpack/type/list.hpp
@@ -57,7 +57,7 @@ inline void operator<< (object::with_zone& o, const std::list<T>& v)
 		o.via.array.ptr = nullptr;
 		o.via.array.size = 0;
 	} else {
-		object* p = static_cast<object*>(o.zone->malloc(sizeof(object)*v.size()));
+		object* p = static_cast<object*>(o.zone->allocate_align(sizeof(object)*v.size()));
 		object* const pend = p + v.size();
 		o.via.array.ptr = p;
 		o.via.array.size = v.size();
diff --git a/src/msgpack/type/map.hpp b/src/msgpack/type/map.hpp
index efbd5210..a4242b77 100644
--- a/src/msgpack/type/map.hpp
+++ b/src/msgpack/type/map.hpp
@@ -78,7 +78,7 @@ inline void operator<< (object::with_zone& o, const type::assoc_vector<K,V>& v)
 		o.via.map.ptr  = nullptr;
 		o.via.map.size = 0;
 	} else {
-		object_kv* p = static_cast<object_kv*>(o.zone->malloc(sizeof(object_kv)*v.size()));
+		object_kv* p = static_cast<object_kv*>(o.zone->allocate_align(sizeof(object_kv)*v.size()));
 		object_kv* const pend = p + v.size();
 		o.via.map.ptr  = p;
 		o.via.map.size = v.size();
@@ -134,7 +134,7 @@ inline void operator<< (object::with_zone& o, const std::map<K,V>& v)
 		o.via.map.ptr  = nullptr;
 		o.via.map.size = 0;
 	} else {
-		object_kv* p = static_cast<object_kv*>(o.zone->malloc(sizeof(object_kv)*v.size()));
+		object_kv* p = static_cast<object_kv*>(o.zone->allocate_align(sizeof(object_kv)*v.size()));
 		object_kv* const pend = p + v.size();
 		o.via.map.ptr  = p;
 		o.via.map.size = v.size();
@@ -184,7 +184,7 @@ inline void operator<< (object::with_zone& o, const std::multimap<K,V>& v)
 		o.via.map.ptr  = nullptr;
 		o.via.map.size = 0;
 	} else {
-		object_kv* p = static_cast<object_kv*>(o.zone->malloc(sizeof(object_kv)*v.size()));
+		object_kv* p = static_cast<object_kv*>(o.zone->allocate_align(sizeof(object_kv)*v.size()));
 		object_kv* const pend = p + v.size();
 		o.via.map.ptr  = p;
 		o.via.map.size = v.size();
diff --git a/src/msgpack/type/pair.hpp b/src/msgpack/type/pair.hpp
index 1b9611e4..266abc72 100644
--- a/src/msgpack/type/pair.hpp
+++ b/src/msgpack/type/pair.hpp
@@ -47,7 +47,7 @@ template <typename T1, typename T2>
 inline void operator<< (object::with_zone& o, const std::pair<T1, T2>& v)
 {
 	o.type = type::ARRAY;
-	object* p = static_cast<object*>(o.zone->malloc(sizeof(object)*2));
+	object* p = static_cast<object*>(o.zone->allocate_align(sizeof(object)*2));
 	o.via.array.ptr = p;
 	o.via.array.size = 2;
 	p[0] = object(v.first, o.zone);
diff --git a/src/msgpack/type/set.hpp b/src/msgpack/type/set.hpp
index 506732e4..cfb6e79a 100644
--- a/src/msgpack/type/set.hpp
+++ b/src/msgpack/type/set.hpp
@@ -56,7 +56,7 @@ inline void operator<< (object::with_zone& o, const std::set<T>& v)
 		o.via.array.ptr = nullptr;
 		o.via.array.size = 0;
 	} else {
-		object* p = static_cast<object*>(o.zone->malloc(sizeof(object)*v.size()));
+		object* p = static_cast<object*>(o.zone->allocate_align(sizeof(object)*v.size()));
 		object* const pend = p + v.size();
 		o.via.array.ptr = p;
 		o.via.array.size = v.size();
@@ -102,7 +102,7 @@ inline void operator<< (object::with_zone& o, const std::multiset<T>& v)
 		o.via.array.ptr = nullptr;
 		o.via.array.size = 0;
 	} else {
-		object* p = static_cast<object*>(o.zone->malloc(sizeof(object)*v.size()));
+		object* p = static_cast<object*>(o.zone->allocate_align(sizeof(object)*v.size()));
 		object* const pend = p + v.size();
 		o.via.array.ptr = p;
 		o.via.array.size = v.size();
diff --git a/src/msgpack/type/string.hpp b/src/msgpack/type/string.hpp
index 692f3921..836de2c6 100644
--- a/src/msgpack/type/string.hpp
+++ b/src/msgpack/type/string.hpp
@@ -42,7 +42,7 @@ inline packer<Stream>& operator<< (packer<Stream>& o, const std::string& v)
 inline void operator<< (object::with_zone& o, const std::string& v)
 {
 	o.type = type::BIN;
-	char* ptr = (char*)o.zone->malloc(v.size());
+	char* ptr = (char*)o.zone->allocate_align(v.size());
 	o.via.bin.ptr = ptr;
 	o.via.bin.size = (uint32_t)v.size();
 	memcpy(ptr, v.data(), v.size());
diff --git a/src/msgpack/type/tr1/unordered_map.hpp b/src/msgpack/type/tr1/unordered_map.hpp
index b652c3f6..830561cb 100644
--- a/src/msgpack/type/tr1/unordered_map.hpp
+++ b/src/msgpack/type/tr1/unordered_map.hpp
@@ -77,7 +77,7 @@ inline void operator<< (object::with_zone& o, const MSGPACK_STD_TR1::unordered_m
 		o.via.map.ptr  = nullptr;
 		o.via.map.size = 0;
 	} else {
-		object_kv* p = static_cast<object_kv*>(o.zone->malloc(sizeof(object_kv)*v.size()));
+		object_kv* p = static_cast<object_kv*>(o.zone->allocate_align(sizeof(object_kv)*v.size()));
 		object_kv* const pend = p + v.size();
 		o.via.map.ptr  = p;
 		o.via.map.size = v.size();
@@ -127,7 +127,7 @@ inline void operator<< (object::with_zone& o, const MSGPACK_STD_TR1::unordered_m
 		o.via.map.ptr  = nullptr;
 		o.via.map.size = 0;
 	} else {
-		object_kv* p = static_cast<object_kv*>(o.zone->malloc(sizeof(object_kv)*v.size()));
+		object_kv* p = static_cast<object_kv*>(o.zone->allocate_align(sizeof(object_kv)*v.size()));
 		object_kv* const pend = p + v.size();
 		o.via.map.ptr  = p;
 		o.via.map.size = v.size();
diff --git a/src/msgpack/type/tr1/unordered_set.hpp b/src/msgpack/type/tr1/unordered_set.hpp
index 985dec6a..c2b2ce8e 100644
--- a/src/msgpack/type/tr1/unordered_set.hpp
+++ b/src/msgpack/type/tr1/unordered_set.hpp
@@ -74,7 +74,7 @@ inline void operator<< (object::with_zone& o, const MSGPACK_STD_TR1::unordered_s
 		o.via.array.ptr = nullptr;
 		o.via.array.size = 0;
 	} else {
-		object* p = static_cast<object*>(o.zone->malloc(sizeof(object)*v.size()));
+		object* p = static_cast<object*>(o.zone->allocate_align(sizeof(object)*v.size()));
 		object* const pend = p + v.size();
 		o.via.array.ptr = p;
 		o.via.array.size = v.size();
@@ -120,7 +120,7 @@ inline void operator<< (object::with_zone& o, const MSGPACK_STD_TR1::unordered_m
 		o.via.array.ptr = nullptr;
 		o.via.array.size = 0;
 	} else {
-		object* p = static_cast<object*>(o.zone->malloc(sizeof(object)*v.size()));
+		object* p = static_cast<object*>(o.zone->allocate_align(sizeof(object)*v.size()));
 		object* const pend = p + v.size();
 		o.via.array.ptr = p;
 		o.via.array.size = v.size();
diff --git a/src/msgpack/type/tuple.hpp.erb b/src/msgpack/type/tuple.hpp.erb
index 6eb0cf5f..6159bc04 100644
--- a/src/msgpack/type/tuple.hpp.erb
+++ b/src/msgpack/type/tuple.hpp.erb
@@ -184,7 +184,7 @@ inline void operator<< (
 		object::with_zone& o,
 		const type::tuple<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>>& v) {
 	o.type = type::ARRAY;
-	o.via.array.ptr = static_cast<object*>(o.zone->malloc(sizeof(object)*<%=i+1%>));
+	o.via.array.ptr = static_cast<object*>(o.zone->allocate_align(sizeof(object)*<%=i+1%>));
 	o.via.array.size = <%=i+1%>;
 	<%0.upto(i) {|j|%>
 	o.via.array.ptr[<%=j%>] = object(v.template get<<%=j%>>(), o.zone);<%}%>
diff --git a/src/msgpack/type/vector.hpp b/src/msgpack/type/vector.hpp
index 03b9d198..ac01b3c5 100644
--- a/src/msgpack/type/vector.hpp
+++ b/src/msgpack/type/vector.hpp
@@ -61,7 +61,7 @@ inline void operator<< (object::with_zone& o, const std::vector<T>& v)
 		o.via.array.ptr = nullptr;
 		o.via.array.size = 0;
 	} else {
-		object* p = static_cast<object*>(o.zone->malloc(sizeof(object)*v.size()));
+		object* p = static_cast<object*>(o.zone->allocate_align(sizeof(object)*v.size()));
 		object* const pend = p + v.size();
 		o.via.array.ptr = p;
 		o.via.array.size = v.size();
diff --git a/src/msgpack/unpack.hpp b/src/msgpack/unpack.hpp
index 07e599b6..0bda90f0 100644
--- a/src/msgpack/unpack.hpp
+++ b/src/msgpack/unpack.hpp
@@ -109,7 +109,7 @@ struct unpack_array {
 	bool operator()(unpack_user&u, unsigned int n, object& o) const {
 		o.type = type::ARRAY;
 		o.via.array.size = 0;
-		o.via.array.ptr = (object*)u.z().malloc(n*sizeof(object));
+		o.via.array.ptr = (object*)u.z().allocate_align(n*sizeof(object));
 		if(o.via.array.ptr == nullptr) { return false; }
 		return true;
 	}
@@ -122,7 +122,7 @@ struct unpack_map {
 	bool operator()(unpack_user& u, unsigned int n, object& o) const {
 		o.type = type::MAP;
 		o.via.map.size = 0;
-		o.via.map.ptr = (object_kv*)u.z().malloc(n*sizeof(object_kv));
+		o.via.map.ptr = (object_kv*)u.z().allocate_align(n*sizeof(object_kv));
 		if(o.via.map.ptr == nullptr) { return false; }
 		return true;
 	}
diff --git a/src/msgpack/zone.hpp.erb b/src/msgpack/zone.hpp.erb
index 6c2ab0ab..35baf049 100644
--- a/src/msgpack/zone.hpp.erb
+++ b/src/msgpack/zone.hpp.erb
@@ -154,8 +154,8 @@ public:
 public:
 	static zone* create(size_t chunk_size);
 	static void destroy(zone* zone);
-	void* malloc(size_t size);
-	void* malloc_no_align(size_t size);
+	void* allocate_align(size_t size);
+	void* allocate_no_align(size_t size);
 
 	void push_finalizer(void (*func)(void*), void* data);
 
@@ -172,12 +172,12 @@ public:
 	<%}%>
 
 private:
-	void undo_malloc(size_t size);
+	void undo_allocate(size_t size);
 
 	template <typename T>
 	static void object_destructor(void* obj);
 
-	void* malloc_expand(size_t size);
+	void* allocate_expand(size_t size);
 };
 
 
@@ -201,16 +201,16 @@ inline zone::zone(size_t chunk_size) /* throw() */ :chunk_size_(chunk_size), chu
 {
 }
 
-inline void* zone::malloc(size_t size)
+inline void* zone::allocate_align(size_t size)
 {
-	return malloc_no_align(
+	return allocate_no_align(
 		((size)+((MSGPACK_ZONE_ALIGN)-1)) & ~((MSGPACK_ZONE_ALIGN)-1));
 }
 
-inline void* zone::malloc_no_align(size_t size)
+inline void* zone::allocate_no_align(size_t size)
 {
 	if(chunk_list_.free_ < size) {
-		return malloc_expand(size);
+		return allocate_expand(size);
 	}
 
 	char* ptr = chunk_list_.ptr_;
@@ -220,7 +220,7 @@ inline void* zone::malloc_no_align(size_t size)
 	return ptr;
 }
 
-inline void* zone::malloc_expand(size_t size)
+inline void* zone::allocate_expand(size_t size)
 {
 	chunk_list* const cl = &chunk_list_;
 
@@ -271,7 +271,7 @@ void zone::object_destructor(void* obj)
 	reinterpret_cast<T*>(obj)->~T();
 }
 
-inline void zone::undo_malloc(size_t size)
+inline void zone::undo_allocate(size_t size)
 {
 	chunk_list_.ptr_  -= size;
 	chunk_list_.free_ += size;
@@ -281,18 +281,18 @@ inline void zone::undo_malloc(size_t size)
 template <typename T<%1.upto(i) {|j|%>, typename A<%=j%><%}%>>
 T* zone::allocate(<%=(1..i).map{|j|"A#{j} a#{j}"}.join(', ')%>)
 {
-	void* x = malloc(sizeof(T));
+	void* x = allocate_align(sizeof(T));
 	try {
 		finalizer_array_.push(&zone::object_destructor<T>, x);
 	} catch (...) {
-		undo_malloc(sizeof(T));
+		undo_allocate(sizeof(T));
 		throw;
 	}
 	try {
 		return new (x) T(<%=(1..i).map{|j|"a#{j}"}.join(', ')%>);
 	} catch (...) {
 		--finalizer_array_.tail_;
-		undo_malloc(sizeof(T));
+		undo_allocate(sizeof(T));
 		throw;
 	}
 }
diff --git a/test/zone.cc b/test/zone.cc
index 5c771028..b364e3fb 100644
--- a/test/zone.cc
+++ b/test/zone.cc
@@ -1,12 +1,12 @@
 #include <msgpack.hpp>
 #include <gtest/gtest.h>
 
-TEST(zone, malloc)
+TEST(zone, allocate_align)
 {
 	msgpack::zone z;
-	char* buf1 = (char*)z.malloc(4);
+	char* buf1 = (char*)z.allocate_align(4);
 	memcpy(buf1, "test", 4);
-	char* buf2 = (char*)z.malloc(4);
+	char* buf2 = (char*)z.allocate_align(4);
 	memcpy(buf2, "test", 4);
 }
 
@@ -68,11 +68,11 @@ TEST(zone, push_finalizer_unique_ptr)
 }
 
 
-TEST(zone, malloc_no_align)
+TEST(zone, allocate_no_align)
 {
 	msgpack::zone z;
-	char* buf1 = (char*)z.malloc_no_align(4);
-	char* buf2 = (char*)z.malloc_no_align(4);
+	char* buf1 = (char*)z.allocate_no_align(4);
+	char* buf2 = (char*)z.allocate_no_align(4);
 	EXPECT_EQ(buf1+4, buf2);
 }