diff --git a/src/tsdb/src/tsdbFS.c b/src/tsdb/src/tsdbFS.c
index 8929ef6f0fa21bb5062d1d3cbfb7038a817df542..cc7e20fb755de31299ea2d744d296edc4512b67e 100644
--- a/src/tsdb/src/tsdbFS.c
+++ b/src/tsdb/src/tsdbFS.c
@@ -92,8 +92,6 @@ static int tsdbEncodeDFileSetArray(void **buf, SArray *pArray) {
 
 static int tsdbDecodeDFileSetArray(void **originBuf, void *buf, SArray *pArray, SFSHeader *pSFSHeader) {
   uint64_t  nset = 0;
-  SDFileSet dset = {0};
-  dset.ver = TSDB_FSET_VER_0;  // default value
 
   taosArrayClear(pArray);
 
@@ -113,6 +111,8 @@ static int tsdbDecodeDFileSetArray(void **originBuf, void *buf, SArray *pArray,
   }
 
   for (size_t i = 0; i < nset; i++) {
+    SDFileSet dset = {0}; // ver is TSDB_FSET_VER_0(0) at default
+    int a = sizeof(dset);
     buf = tsdbDecodeDFileSet(buf, &dset, pSFSHeader->version);
     taosArrayPush(pArray, (void *)(&dset));
   }