From c9df82da969e8d49cd855e3017581e83680a8db1 Mon Sep 17 00:00:00 2001
From: Sirryan2002 <80364400+Sirryan2002@users.noreply.github.com>
Date: Sun, 21 Nov 2021 01:50:34 -0500
Subject: [PATCH] hotfix (#17147)

---
 code/modules/paperwork/faxmachine.dm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/code/modules/paperwork/faxmachine.dm b/code/modules/paperwork/faxmachine.dm
index a7b31e6bb8b..49c812399a0 100644
--- a/code/modules/paperwork/faxmachine.dm
+++ b/code/modules/paperwork/faxmachine.dm
@@ -149,7 +149,7 @@ GLOBAL_LIST_EMPTY(fax_blacklist)
 
 
 /obj/machinery/photocopier/faxmachine/ui_act(action, params)
-	if(!..()) // !..() here because the parent photocopier proc returns null as opposed to TRUE if the ui should not be interacted with.
+	if(isnull(..())) // isnull(..()) here because the parent photocopier proc returns null as opposed to TRUE if the ui should not be interacted with.
 		return
 	var/is_authenticated = is_authenticated(usr)
 	. = TRUE