diff --git a/ChangeLog b/ChangeLog
index c4151406f5..0d9e96f201 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Nov 20 01:00:59 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* parse.y (reg_named_capture_assign_gen): use predefined ID
+	  instead of rb_intern.
+
 Thu Nov 20 00:54:57 2014  Tanaka Akira  <akr@fsij.org>
 
 	* internal.h (ruby_init_setproctitle): Declare here.
diff --git a/parse.y b/parse.y
index 8dc8dbebfd..1d66331e16 100644
--- a/parse.y
+++ b/parse.y
@@ -10219,11 +10219,10 @@ reg_compile_gen(struct parser_params* parser, VALUE str, int options)
     err = rb_errinfo();
     re = rb_reg_compile(str, options & RE_OPTION_MASK, ruby_sourcefile, ruby_sourceline);
     if (NIL_P(re)) {
-	ID mesg = rb_intern("mesg");
-	VALUE m = rb_attr_get(rb_errinfo(), mesg);
+	VALUE m = rb_attr_get(rb_errinfo(), idMesg);
 	rb_set_errinfo(err);
 	if (!NIL_P(err)) {
-	    rb_str_append(rb_str_cat(rb_attr_get(err, mesg), "\n", 1), m);
+	    rb_str_append(rb_str_cat(rb_attr_get(err, idMesg), "\n", 1), m);
 	}
 	else {
 	    compile_error(PARSER_ARG "%"PRIsVALUE, m);