From dac43e6e76de770361c69b3a40dbde9a1bb70c00 Mon Sep 17 00:00:00 2001
From: Shivaram Lingamneni <slingamn@cs.stanford.edu>
Date: Sun, 1 Nov 2020 18:09:04 -0500
Subject: [PATCH] fix #1370

---
 irc/channel.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/irc/channel.go b/irc/channel.go
index 59a80a04..d444de74 100644
--- a/irc/channel.go
+++ b/irc/channel.go
@@ -1256,7 +1256,7 @@ func (channel *Channel) isMuted(client *Client) bool {
 	if muteRe == nil {
 		return false
 	}
-	nuh := client.NickMaskString()
+	nuh := client.NickMaskCasefolded()
 	return muteRe.MatchString(nuh) && !channel.lists[modes.ExceptMask].MatchMute(nuh)
 }