diff --git a/appl/ftp/ftp/kauth.c b/appl/ftp/ftp/kauth.c
index 1295d8cd1..ce0cc5b8f 100644
--- a/appl/ftp/ftp/kauth.c
+++ b/appl/ftp/ftp/kauth.c
@@ -37,6 +37,7 @@
  */
 
 #include "ftp_locl.h"
+#include <krb.h>
 RCSID("$Id$");
 
 void