diff --git a/src/rx/rx.c b/src/rx/rx.c
index 6ca7ee543f..88c135a57c 100644
--- a/src/rx/rx.c
+++ b/src/rx/rx.c
@@ -5982,6 +5982,13 @@ int rxs_GetAuthData (struct rx_connection * aconn,
 		     afs_int64 *expires, afs_int32 *level,
 		     int *nnames, struct rx_securityName *names)
 {
+    /* Default answers, in case the op is unimplemented */
+    if (expires)
+	ZeroInt64(*expires);
+    if (level)
+	*level = RX_LEVEL_NULL;
+    if (names && nnames)
+	*nnames = 0;
     return RXS_GetAuthData(rx_SecurityObjectOf(aconn), aconn,
 			   expires, level, nnames, names);
 }
diff --git a/src/rxkad/rxkad_server.c b/src/rxkad/rxkad_server.c
index db83c69bec..6685888a34 100644
--- a/src/rxkad/rxkad_server.c
+++ b/src/rxkad/rxkad_server.c
@@ -473,7 +473,7 @@ rxkad_GetAuthData(struct rx_securityClass *aobj,
     if (sconn && sconn->authenticated && sconn->rock
 	&& (time(0) < sconn->expirationTime)) {
 	if (expires)
-	    *expires = sconn->expirationTime;
+	    FillInt64(*expires, 0, sconn->expirationTime);
 	if (level) {
 	    switch (sconn->level) {
 		case rxkad_clear: *level = RX_LEVEL_CLEAR;   break;