diff --git a/src/backend/access/transam/xact.c b/src/backend/access/transam/xact.c
index fd5103a78e..fe0cf5527b 100644
--- a/src/backend/access/transam/xact.c
+++ b/src/backend/access/transam/xact.c
@@ -741,10 +741,6 @@ AssignTransactionId(TransactionState s)
 		unreportedXids[nUnreportedXids] = XidFromFullTransactionId(s->fullTransactionId);
 		nUnreportedXids++;
 
-		/*
-		 * ensure this test matches similar one in
-		 * RecoverPreparedTransactions()
-		 */
 		if (nUnreportedXids >= PGPROC_MAX_CACHED_SUBXIDS ||
 			log_unknown_top)
 		{