diff --git a/ChangeLog b/ChangeLog
index 731cafde9b..002966d198 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Nov 26 15:16:07 2008  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* ext/gdbm/gdbm.c (rb_gdbm_nextkey): fix memory leak.
+
 Wed Nov 26 03:17:48 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* ext/bigdecimal/bigdecimal.c (BigDecimal_to_r): raise exception
diff --git a/ext/gdbm/gdbm.c b/ext/gdbm/gdbm.c
index 1e83608132..edde0d19ab 100644
--- a/ext/gdbm/gdbm.c
+++ b/ext/gdbm/gdbm.c
@@ -344,6 +344,7 @@ rb_gdbm_nextkey(GDBM_FILE dbm, VALUE keystr)
         return Qnil;
 
     str = rb_str_new(key2.dptr, key2.dsize);
+    free(key2.dptr);
     OBJ_TAINT(str);
     return str;
 }