diff --git a/net/xfrm/xfrm_replay.c b/net/xfrm/xfrm_replay.c
index a390673..8dafe6d3 100644
--- a/net/xfrm/xfrm_replay.c
+++ b/net/xfrm/xfrm_replay.c
@@ -359,14 +359,12 @@
 		if (replay_esn->seq_hi == preplay_esn->seq_hi)
 			seq_diff = replay_esn->seq - preplay_esn->seq;
 		else
-			seq_diff = UINT_MAX - preplay_esn->seq
-				   + replay_esn->seq;
+			seq_diff = ~preplay_esn->seq + replay_esn->seq + 1;
 
 		if (replay_esn->oseq_hi == preplay_esn->oseq_hi)
 			oseq_diff = replay_esn->oseq - preplay_esn->oseq;
 		else
-			oseq_diff = UINT_MAX - preplay_esn->oseq
-				    + replay_esn->oseq;
+			oseq_diff = ~preplay_esn->oseq + replay_esn->oseq + 1;
 
 		if (seq_diff < x->replay_maxdiff &&
 		    oseq_diff < x->replay_maxdiff) {