1 files changed, 1 insertions, 1 deletions
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));