diff --git a/src/include/access/hash.h b/src/include/access/hash.h
index 7fa868b..de86f31 100644
--- a/src/include/access/hash.h
+++ b/src/include/access/hash.h
@@ -182,10 +182,10 @@ typedef HashScanOpaqueData *HashScanOpaque;
  * after HASH_SPLITPOINT_GROUPS_WITH_ONE_PHASE).
  *
  * There is no particular upper limit on the size of mapp[], other than
- * needing to fit into the metapage.  (With 8K block size, 128 bitmaps
- * limit us to 64 GB of overflow space...)
+ * needing to fit into the metapage.  (With 8K block size, 1024 bitmaps
+ * limit us to 256 GB of overflow space...)
  */
-#define HASH_MAX_BITMAPS			128
+#define HASH_MAX_BITMAPS			1024
 
 #define HASH_SPLITPOINT_PHASE_BITS	2
 #define HASH_SPLITPOINT_PHASES_PER_GRP	(1 << HASH_SPLITPOINT_PHASE_BITS)