diff --git a/src/expire.cpp b/src/expire.cpp
index 3df9436fd..6ef892fee 100644
--- a/src/expire.cpp
+++ b/src/expire.cpp
@@ -168,7 +168,7 @@ void expireMemberCore(client *c, robj *key, robj *subkey, long long basetime, lo
     {
     case OBJ_SET:
         if (!setTypeIsMember(val, szFromObj(subkey))) {
-            addReplyError(c, "subkey does not exist");
+            addReply(c,shared.czero);
             return;
         }
         break;
@@ -180,7 +180,7 @@ void expireMemberCore(client *c, robj *key, robj *subkey, long long basetime, lo
 
     setExpire(c, c->db, key, subkey, when);
 
-    addReply(c, shared.ok);
+    addReply(c, shared.cone);
 }
 
 void expireMemberCommand(client *c)