diff --git a/ChangeLog b/ChangeLog
index bdca90c727..7268671b42 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Dec  3 01:52:43 2010  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* encoding.c (enc_alias_internal): use xfree instead of free.
+
 Thu Dec  2 23:52:26 2010  URABE Shyouhei  <shyouhei@ruby-lang.org>
 
 	* NEWS: entry for ruby_vm_at_exit().
diff --git a/encoding.c b/encoding.c
index db0f5c8ae6..70cc65ba3b 100644
--- a/encoding.c
+++ b/encoding.c
@@ -445,7 +445,7 @@ enc_alias_internal(const char *alias, int idx)
 {
     char *name = strdup(alias);
     if (st_insert(enc_table.names, (st_data_t)name, (st_data_t)idx)) {
-	free(name);
+	xfree(name);
 	return NULL;
     }
     return name;