diff --git a/src/tsdb/src/tsdbRecover.c b/src/tsdb/src/tsdbRecover.c
index d0022b013529bdc8c36ada419e881c4d517262ca..de3a912cc3bd973f91173d4bd41203ada73879b8 100644
--- a/src/tsdb/src/tsdbRecover.c
+++ b/src/tsdb/src/tsdbRecover.c
@@ -252,7 +252,7 @@ static int tsdbRefactorHeadF(STsdbRepo *pRepo, SRecoverH *pRecoverH, SDFileSet *
     return -1;
   }
 
-  int    arraySize = taosArrayGetSize(pReadH->aBlkIdx);
+  int    arraySize = (int)taosArrayGetSize(pReadH->aBlkIdx);
   SBlock supBlk;
   for (int iBlkIdx = 0; iBlkIdx < arraySize; ++iBlkIdx) {
     pReadH->pBlkIdx = taosArrayGet(pReadH->aBlkIdx, iBlkIdx);