diff --git a/internal/querynodev2/handlers.go b/internal/querynodev2/handlers.go
index ac78dec382..ff20201fbd 100644
--- a/internal/querynodev2/handlers.go
+++ b/internal/querynodev2/handlers.go
@@ -277,7 +277,7 @@ func (node *QueryNode) optimizeSearchParams(ctx context.Context, req *querypb.Se
 		}, 0)
 		// use shardNum * segments num in shard to estimate total segment number
 		estSegmentNum := sealedNum * int(channelNum)
-		withFilter := (plan.GetVectorAnns().GetPredicates() == nil)
+		withFilter := (plan.GetVectorAnns().GetPredicates() != nil)
 		queryInfo := plan.GetVectorAnns().GetQueryInfo()
 		params := map[string]any{
 			common.TopKKey:        queryInfo.GetTopk(),