diff --git a/src/backend/access/gin/ginxlog.c b/src/backend/access/gin/ginxlog.c
index 94051aa1c3..388589beac 100644
--- a/src/backend/access/gin/ginxlog.c
+++ b/src/backend/access/gin/ginxlog.c
@@ -671,9 +671,10 @@ gin_redo(XLogRecPtr lsn, XLogRecord *record)
 	uint8		info = record->xl_info & ~XLR_INFO_MASK;
 
 	/*
-	 * GIN indexes do not require any conflict processing.
+	 * GIN indexes do not require any conflict processing. NB: If we ever
+	 * implement a similar optimization as we have in b-tree, and remove
+	 * killed tuples outside VACUUM, we'll need to handle that here.
 	 */
-
 	RestoreBkpBlocks(lsn, record, false);
 
 	topCtx = MemoryContextSwitchTo(opCtx);