diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index 7c4142087ba94d2823e9afc801255c058aab09b1..95cdf422f97e39d60aaf1e05046d1c48c6f7d72c 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -2778,7 +2778,7 @@ static int readSampleFromCsvFileToMem(
       continue;
     }
 
-    verbosePrint("readLen=%ld stb->lenOfOneRow=%d getRows=%d\n", readLen,
+    verbosePrint("readLen=%ld stb->lenOfOneRow=%d getRows=%d\n", (long)readLen,
             superTblInfo->lenOfOneRow, getRows);
 
     memcpy(superTblInfo->sampleDataBuf + getRows * superTblInfo->lenOfOneRow,