diff --git a/lustre/utils/gss/lsupport.h b/lustre/utils/gss/lsupport.h
index 7fff8ad2cd012005a90b0b1f876d38ebc41278e7..2172e9ca36978e2fa087aca1bf1b1671bb5c9b31 100644
--- a/lustre/utils/gss/lsupport.h
+++ b/lustre/utils/gss/lsupport.h
@@ -56,6 +56,6 @@ struct lgssd_ioctl_param {
 
 int lnet_nid2hostname(lnet_nid_t nid, char *buf, int buflen);
 void cleanup_mapping(void);
-int lookup_mapping(char *princ, uint64_t nid, uid_t *uid);
+int lookup_mapping(char *princ, lnet_nid_t nid, uid_t *uid);
 
 #endif /* __LSUPPORT_H__ */