diff --git a/src/redis.c b/src/redis.c
index 1d732e91f1bde6a534821025e79108a2fab5152e..3c8155634aac670faebc5d20eadb423da8a5e0bd 100644
--- a/src/redis.c
+++ b/src/redis.c
@@ -967,9 +967,9 @@ void call(redisClient *c) {
     duration = ustime()-start;
     slowlogPushEntryIfNeeded(c->argv,c->argc,duration);
 
-    if (server.appendonly && dirty)
+    if (server.appendonly && dirty > 0)
         feedAppendOnlyFile(c->cmd,c->db->id,c->argv,c->argc);
-    if ((dirty || c->cmd->flags & REDIS_CMD_FORCE_REPLICATION) &&
+    if ((dirty > 0 || c->cmd->flags & REDIS_CMD_FORCE_REPLICATION) &&
         listLength(server.slaves))
         replicationFeedSlaves(server.slaves,c->db->id,c->argv,c->argc);
     if (listLength(server.monitors))