diff --git a/ruby/makegem.sh b/ruby/makegem.sh
index 827f4521..d21f06a1 100755
--- a/ruby/makegem.sh
+++ b/ruby/makegem.sh
@@ -19,6 +19,8 @@ cp ../test/cases.json           test/
 
 gem build msgpack.gemspec
 
+rdoc rbinit.c pack.c unpack.c
+
 if [ $? -eq 0 ]; then
 	rm -rf ext msgpack test/msgpack_test.rb
 fi
diff --git a/ruby/unpack.c b/ruby/unpack.c
index 65ae476e..151dbf4a 100644
--- a/ruby/unpack.c
+++ b/ruby/unpack.c
@@ -638,7 +638,7 @@ static VALUE MessagePack_Unpacker_execute_impl(VALUE self, VALUE data,
  * Document-method: MessagePack::Unpacker#execute_limit
  *
  * call-seq:
- *   unpacker.unpack_limit(data, offset, limit) -> next offset
+ *   unpacker.execute_limit(data, offset, limit) -> next offset
  *
  * Deserializes one object over the specified buffer from _offset_ bytes upto _limit_ bytes.
  *
@@ -660,7 +660,7 @@ static VALUE MessagePack_Unpacker_execute_limit(VALUE self, VALUE data,
  * Document-method: MessagePack::Unpacker#execute
  *
  * call-seq:
- *   unpacker.unpack(data, offset) -> next offset
+ *   unpacker.execute(data, offset) -> next offset
  *
  * Deserializes one object over the specified buffer from _offset_ bytes.
  *