diff --git a/ChangeLog b/ChangeLog
index 365991bc1f..531b0201ed 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Aug  6 14:36:30 2007  Koichi Sasada  <ko1@atdot.net>
+
+	* parse.y: fix a f_marg rule. [ruby-dev:31160]
+
 Mon Aug  6 14:29:30 2007  Koichi Sasada  <ko1@atdot.net>
 
 	* bootstraptest/runner.rb (assert_equal): add additional
diff --git a/parse.y b/parse.y
index 9b3fbe914c..e7a76ee613 100644
--- a/parse.y
+++ b/parse.y
@@ -3000,7 +3000,7 @@ f_marg		: f_norm_arg
 		| tLPAREN f_margs rparen
 		    {
 		    /*%%%*/
-			$$ = NEW_LIST($2);
+			$$ = NEW_MASGN(NEW_LIST($2), 0);
 		    /*%
 			$$ = dispatch1(mlhs_paren, $2);
 		    %*/