diff --git a/source/libs/executor/src/tsort.c b/source/libs/executor/src/tsort.c
index 38aac39d8e..64f47baca9 100644
--- a/source/libs/executor/src/tsort.c
+++ b/source/libs/executor/src/tsort.c
@@ -1100,7 +1100,7 @@ static int32_t createBlocksMergeSortInitialSources(SSortHandle* pHandle) {
 
     int64_t p = taosGetTimestampUs();
     bool bExtractedBlock = false;
-    if (pBlk != NULL && pHandle->mergeLimit != -1) {
+    if (pBlk != NULL && pHandle->mergeLimit > 0) {
       pBlk = getRowsBlockWithinMergeLimit(pHandle, mTableNumRows, pBlk, &bExtractedBlock);
     }