diff --git a/source/common/src/tdataformat.c b/source/common/src/tdataformat.c
index 110c3bc8f47bc4228539782fc49fbc8bf8927c29..2a408594002fd9f259003ac98fa17267509a6ffe 100644
--- a/source/common/src/tdataformat.c
+++ b/source/common/src/tdataformat.c
@@ -411,7 +411,7 @@ _exit:
 
 int32_t tTSRowClone(const STSRow2 *pRow, STSRow2 **ppRow) {
   int32_t code = 0;
-  int32_t rLen;
+  int32_t rLen = 0;
 
   TSROW_LEN(pRow, rLen);
   (*ppRow) = (STSRow2 *)taosMemoryMalloc(rLen);
@@ -1711,4 +1711,4 @@ int32_t tColDataCopy(SColData *pColDataSrc, SColData *pColDataDest) {
 
 _exit:
   return code;
-}
\ No newline at end of file
+}