diff --git a/lib/dns/gssapi_link.c b/lib/dns/gssapi_link.c
index 5645814562..ec8fc656d8 100644
--- a/lib/dns/gssapi_link.c
+++ b/lib/dns/gssapi_link.c
@@ -16,7 +16,7 @@
  */
 
 /*
- * $Id: gssapi_link.c,v 1.14 2009/10/24 23:47:36 tbox Exp $
+ * $Id: gssapi_link.c,v 1.14.36.1 2011/03/28 05:37:06 marka Exp $
  */
 
 #include <config.h>
@@ -174,7 +174,7 @@ gssapi_sign(dst_context_t *dctx, isc_buffer_t *sig) {
 	 * allocated space.
 	 */
 	isc_buffer_putmem(sig, gsig.value, gsig.length);
-	if (gsig.length != 0)
+	if (gsig.length != 0U)
 		gss_release_buffer(&minor, &gsig);
 
 	return (ISC_R_SUCCESS);