diff --git a/src/msgpack/zone.hpp.erb b/src/msgpack/zone.hpp.erb
index 705dd34c..b2c19db0 100644
--- a/src/msgpack/zone.hpp.erb
+++ b/src/msgpack/zone.hpp.erb
@@ -52,7 +52,6 @@ public:
 	}
 	static void operator delete(void *p) throw()
 	{
-		if (!p) return;
 		::free(p);
 	}
 	<%0.upto(GENERATION_LIMIT) {|i|%>