diff --git a/ChangeLog b/ChangeLog
index 6995808990..389f1714c7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Sep 12 20:00:22 2008  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* regparse.c (parse_exp): fix resource leak.
+
 Fri Sep 12 01:21:22 2008  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* ext/syck/node.c (syck_replace_str2): fix wrong check to free ptr.
diff --git a/regparse.c b/regparse.c
index 3d2c57a25a..168b175758 100644
--- a/regparse.c
+++ b/regparse.c
@@ -5387,7 +5387,10 @@ parse_exp(Node** np, OnigToken* tok, int term,
       if (tok->u.repeat.possessive != 0) {
 	Node* en;
 	en = node_new_enclose(ENCLOSE_STOP_BACKTRACK);
-	CHECK_NULL_RETURN_MEMERR(en);
+	if (IS_NULL(en)) {
+	  onig_node_free(qn);
+	  return ONIGERR_MEMORY;
+	}
 	NENCLOSE(en)->target = qn;
 	qn = en;
       }