diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index 362dc51ad5a9efcf9752669729662d1973b613a3..5bd41dd86f38f4787565eb59bef3d838b5e40981 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -4251,8 +4251,8 @@ static int32_t doOpenReaderImpl(STsdbReader* pReader) {
 }
 
 static void freeSchemaFunc(void* param) {
-  void* p = *(void**)param;
-  taosMemoryFree(p);
+  void **p = (void **)param;
+  taosMemoryFreeClear(*p);
 }
 
 // ====================================== EXPOSED APIs ======================================