diff --git a/src/redis-shake/dbSync/dbSyncer.go b/src/redis-shake/dbSync/dbSyncer.go
index adc6ed69..aa876627 100644
--- a/src/redis-shake/dbSync/dbSyncer.go
+++ b/src/redis-shake/dbSync/dbSyncer.go
@@ -117,6 +117,7 @@ func (ds *DbSyncer) Sync() {
 		// sync
 		input, nsize = ds.sendSyncCmd(ds.source, conf.Options.SourceAuthType, ds.sourcePassword,
 			conf.Options.SourceTLSEnable, conf.Options.SourceTLSSkipVerify)
+		isFullSync = true
 	}
 	defer input.Close()