diff --git a/ChangeLog b/ChangeLog
index 8aabf6d22f..7235b943f7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed May  8 13:06:31 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* include/ruby/ruby.h (ISGRAPH): add missing macro.
+
 Wed May  8 06:42:56 2013  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* ext/socket/socket.c (socket_s_ip_address_list): fix wrongly filled
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index c01242e274..c1bf06d6e4 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -1617,6 +1617,7 @@ int rb_toupper(int c);
 #define ISASCII(c) rb_isascii((unsigned char)(c))
 #undef ISPRINT
 #define ISPRINT(c) rb_isprint((unsigned char)(c))
+#define ISGRAPH(c) rb_isgraph((unsigned char)(c))
 #define ISSPACE(c) rb_isspace((unsigned char)(c))
 #define ISUPPER(c) rb_isupper((unsigned char)(c))
 #define ISLOWER(c) rb_islower((unsigned char)(c))