diff --git a/ChangeLog b/ChangeLog
index 1d426a9c80..5c09f89bb2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue May 26 21:35:13 2015  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* include/ruby/defines.h (RUBY_ATTR_ALLOC_SIZE): fix condition.
+
 Mon May 25 22:35:58 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* tool/redmine-backporter.rb (rel): after the relations is changed,
diff --git a/include/ruby/defines.h b/include/ruby/defines.h
index f83ced006c..05a7ddd90d 100644
--- a/include/ruby/defines.h
+++ b/include/ruby/defines.h
@@ -112,7 +112,7 @@ RUBY_SYMBOL_EXPORT_BEGIN
 #define xrealloc2 ruby_xrealloc2
 #define xfree ruby_xfree
 
-#if defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 3
+#if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
 # define RUBY_ATTR_ALLOC_SIZE(params) __attribute__ ((__alloc_size__ params))
 #else
 # define RUBY_ATTR_ALLOC_SIZE(params)