diff --git a/source/dnode/vnode/src/tsdb/tsdbRetention.c b/source/dnode/vnode/src/tsdb/tsdbRetention.c
index 6580b89dad7240dd1993f140eea001bd2b4776da..c8236e8f521a73606c7dde065ec95a2267314081 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRetention.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRetention.c
@@ -23,7 +23,7 @@ typedef struct {
   int64_t cid;
 
   TFileSetArray *fsetArr;
-  TFileOpArray  *fopArr;
+  TFileOpArray   fopArr[1];
 
   struct {
     int32_t    fsetArrIdx;