diff --git a/appl/xnlock/xnlock.c b/appl/xnlock/xnlock.c
index e2ce4dbcc..4d6b8136e 100644
--- a/appl/xnlock/xnlock.c
+++ b/appl/xnlock/xnlock.c
@@ -36,6 +36,8 @@ RCSID("$Id$");
 #endif
 #ifdef KRB4
 #include <krb.h>
+#endif
+#if defined(KRB4) || defined(KRB5)
 #include <kafs.h>
 #endif