--- a/src/include/storage/buf_internals.h
+++ b/src/include/storage/buf_internals.h
@@ -382,6 +382,7 @@ UnlockBufHdr(BufferDesc *desc, uint32 buf_state)
 typedef struct CkptSortItem
 {
 	Oid			tsId;
+	Oid			db_id;