diff --git a/appl/ftp/ftp/krb4.c b/appl/ftp/ftp/krb4.c
index d3d295b2d..f2b383b33 100644
--- a/appl/ftp/ftp/krb4.c
+++ b/appl/ftp/ftp/krb4.c
@@ -87,6 +87,7 @@ krb4_decode(void *app_data, void *buf, int len, int level)
 			(struct sockaddr_in *)REMOTE_ADDR,
 			(struct sockaddr_in *)LOCAL_ADDR, &m);
     if(e){
+	syslog(LOG_ERR, "krb4_decode: %s", krb_get_err_text(e));
 	return -1;
     }
     memmove(buf, m.app_data, m.app_length);