diff --git a/src/expire.c b/src/expire.c
index f2d135e2b..1c4f71df3 100644
--- a/src/expire.c
+++ b/src/expire.c
@@ -594,6 +594,7 @@ void pttlCommand(client *c) {
 void persistCommand(client *c) {
     if (lookupKeyWrite(c->db,c->argv[1])) {
         if (removeExpire(c->db,c->argv[1])) {
+            signalModifiedKey(c,c->db,c->argv[1]);
             notifyKeyspaceEvent(NOTIFY_GENERIC,"persist",c->argv[1],c->db->id);
             addReply(c,shared.cone);
             server.dirty++;