diff --git a/ChangeLog b/ChangeLog
index 714a0a3e3b..f2cc2ff780 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Oct 27 12:02:53 2008  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* ext/nkf/nkf.c (rb_nkf_convert): should specify type of variable.
+
 Mon Oct 27 11:34:56 2008  Yuki Sonoda (Yugui)  <yugui@yugui.jp>
 
 	* test/minitest/test_mini_test.rb (test_filter_backtrace):
diff --git a/ext/nkf/nkf.c b/ext/nkf/nkf.c
index d9db1de086..82327bf356 100644
--- a/ext/nkf/nkf.c
+++ b/ext/nkf/nkf.c
@@ -135,7 +135,7 @@ int nkf_split_options(const char *arg)
 static VALUE
 rb_nkf_convert(VALUE obj, VALUE opt, VALUE src)
 {
-    volatile tmp;
+    volatile VALUE tmp;
     reinit();
     StringValue(opt);
     nkf_split_options(RSTRING_PTR(opt));