diff --git a/source/libs/executor/src/tsort.c b/source/libs/executor/src/tsort.c
index 4ca15aa600..b3f342c694 100644
--- a/source/libs/executor/src/tsort.c
+++ b/source/libs/executor/src/tsort.c
@@ -121,9 +121,9 @@ void tsortClearOrderdSource(SArray* pOrderedSource) {
     if ((*pSource)->param && !(*pSource)->onlyRef) {
       taosMemoryFree((*pSource)->param);
     }
-    if (pSource->src.pBlock) {
-      blockDataDestroy(pSource->src.pBlock);
-      pSource->src.pBlock = NULL;
+    if ((*pSource)->src.pBlock) {
+      blockDataDestroy((*pSource)->src.pBlock);
+      (*pSource)->src.pBlock = NULL;
     }
     taosMemoryFreeClear(*pSource);
   }