diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index 89686c3d33..ccb4cce199 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -4236,7 +4236,7 @@ static int32_t doOpenReaderImpl(STsdbReader* pReader) {
 
 static void freeSchemaFunc(void* param) {
   void* p = *(void**)param;
-  taosMemoryFree(p);
+  taosMemoryFreeClear(p);
 }
 
 // ====================================== EXPOSED APIs ======================================