diff --git a/sys/fs/nfsclient/nfs_clport.c b/sys/fs/nfsclient/nfs_clport.c
index fc62783e396..7f9b18e9970 100644
--- a/sys/fs/nfsclient/nfs_clport.c
+++ b/sys/fs/nfsclient/nfs_clport.c
@@ -1194,6 +1194,10 @@ nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid)
 		printf("nfsv4 no file handle: usually means the file "
 		    "system is not exported on the NFSv4 server\n");
 		return (EIO);
+	case NFSERR_WRONGSEC:
+		tprintf(p, LOG_INFO, "NFSv4 error WrongSec: You probably need a"
+		    " Kerberos TGT\n");
+		return (EIO);
 	default:
 		tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error);
 		return (EIO);