diff --git a/source/dnode/vnode/src/tsdb/tsdbSttFileRW.c b/source/dnode/vnode/src/tsdb/tsdbSttFileRW.c
index c8b2cf3adf..69ec30fe40 100644
--- a/source/dnode/vnode/src/tsdb/tsdbSttFileRW.c
+++ b/source/dnode/vnode/src/tsdb/tsdbSttFileRW.c
@@ -556,7 +556,7 @@ static int32_t tsdbSttFileDoWriteStatisBlock(SSttFileWriter *writer) {
     SValueColumnCompressInfo compressInfo = {.cmprAlg = statisBlk.cmprAlg};
 
     tBufferClear(buffer0);
-    tBufferClear(buffer0);
+    tBufferClear(buffer1);
 
     for (int32_t i = 0; i < statisBlk.numOfPKs; i++) {
       code = tValueColumnCompress(&statisBlock->firstKeyPKs[i], &compressInfo, buffer1, assist);