diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 3eec30000f3..01bc68c628a 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -126,7 +126,7 @@ static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen)
 	if (*ep)
 		goto out;
 	dprintk("found fsidtype %d\n", fsidtype);
-	if (fsidtype > 2)
+	if (key_len(fsidtype)==0) /* invalid type */
 		goto out;
 	if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0)
 		goto out;