diff --git a/src/include/access/hash_xlog.h b/src/include/access/hash_xlog.h
index a2f0f39213..9894ab9afe 100644
--- a/src/include/access/hash_xlog.h
+++ b/src/include/access/hash_xlog.h
@@ -251,13 +251,13 @@ typedef struct xl_hash_init_bitmap_page
 typedef struct xl_hash_vacuum_one_page
 {
 	TransactionId snapshotConflictHorizon;
-	int			ntuples;
+	uint16			ntuples;
 
 	/* TARGET OFFSET NUMBERS FOLLOW AT THE END */
 } xl_hash_vacuum_one_page;
 
 #define SizeOfHashVacuumOnePage \
-	(offsetof(xl_hash_vacuum_one_page, ntuples) + sizeof(int))
+	(offsetof(xl_hash_vacuum_one_page, ntuples) + sizeof(uint16))
 
 extern void hash_redo(XLogReaderState *record);
 extern void hash_desc(StringInfo buf, XLogReaderState *record);