diff --git a/sys/fs/nfsserver/nfs_nfsdport.c b/sys/fs/nfsserver/nfs_nfsdport.c
index daa57222fe2..9cd7f9320bd 100644
--- a/sys/fs/nfsserver/nfs_nfsdport.c
+++ b/sys/fs/nfsserver/nfs_nfsdport.c
@@ -1926,6 +1926,8 @@ nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp,
 			}
 		}
 	} else if (done_namei) {
+		KASSERT(create == NFSV4OPEN_CREATE,
+		    ("nfsvno_open: not create"));
 		/*
 		 * done_namei is set when nfsvno_namei() has completed
 		 * successfully, but a subsequent error was set in