diff --git a/src/common/src/texpr.c b/src/common/src/texpr.c
index 6384a96a96dc766ee1c6e4c801a23672361697b7..36da3817824f1c03dc0bc19492e23d25799945cc 100644
--- a/src/common/src/texpr.c
+++ b/src/common/src/texpr.c
@@ -289,7 +289,7 @@ static void exprTreeToBinaryImpl(SBufferWriter* bw, tExprNode* expr) {
     tVariant* pVal = expr->pVal;
     
     tbufWriteUint32(bw, pVal->nType);
-    if (pVal->nType == TSDB_DATA_TYPE_BINARY || Val->nType == TSDB_DATA_TYPE_NCHAR) {
+    if (pVal->nType == TSDB_DATA_TYPE_BINARY || pVal->nType == TSDB_DATA_TYPE_NCHAR) {
       tbufWriteInt32(bw, pVal->nLen);
       tbufWrite(bw, pVal->pz, pVal->nLen);
     } else {