diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c b/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c
index c49bfdfc462c4cf25406f0d3ebe180abe9281498..6f6a989e42db6776fd4d0ae372365fa1b7198553 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbMerge.c
@@ -19,6 +19,8 @@ typedef struct {
   STsdb    *pTsdb;
   SFileSet *pSet;
 
+  SBlockData bData;
+
   // reader
   SSttFileReader *pSttFReader;
   int32_t         nSttFSegReader;