diff --git a/src/client/src/tscPrepare.c b/src/client/src/tscPrepare.c
index 41375010838af79bcb247e73b30f6c8abbdee646..030022b0fd0109b44a6098400c5d351a8e5eeed1 100644
--- a/src/client/src/tscPrepare.c
+++ b/src/client/src/tscPrepare.c
@@ -277,6 +277,7 @@ static char* normalStmtBuildSql(STscStmt* stmt) {
     case TSDB_DATA_TYPE_SMALLINT:
     case TSDB_DATA_TYPE_INT:
     case TSDB_DATA_TYPE_BIGINT:
+    case TSDB_DATA_TYPE_TIMESTAMP:
       taosStringBuilderAppendInteger(&sb, var->i64);
       break;