diff --git a/ChangeLog b/ChangeLog
index 35d891b120..d21fc912b8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jul 29 08:08:07 2009  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* parse.y (regexp): regexp literal at the top of dstr is still needed
+	  even if it is empty.
+
 Wed Jul 29 03:36:24 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* ext/json/lib/json/common.rb (JSON#recurse_proc): remove
diff --git a/parse.y b/parse.y
index 10ac878749..fbbad25fb8 100644
--- a/parse.y
+++ b/parse.y
@@ -3831,7 +3831,7 @@ regexp		: tREGEXP_BEG xstring_contents tREGEXP_END
 			    }
 			    break;
 			  default:
-			    node = NEW_NODE(NODE_DSTR, Qnil, 1, NEW_LIST(node));
+			    node = NEW_NODE(NODE_DSTR, STR_NEW0(), 1, NEW_LIST(node));
 			  case NODE_DSTR:
 			    if (options & RE_OPTION_ONCE) {
 				nd_set_type(node, NODE_DREGX_ONCE);