From 6d1b5f3e9bdfa80d83f895eaf0c93bdc7d21f1fb Mon Sep 17 00:00:00 2001
From: Joseph Wright <joseph.wright@morningstar2.co.uk>
Date: Fri, 26 Nov 2021 10:55:15 +0000
Subject: [PATCH] Add a variant

---
 l3kernel/l3keys.dtx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/l3kernel/l3keys.dtx b/l3kernel/l3keys.dtx
index c001193c5e..1e7bc0cf28 100644
--- a/l3kernel/l3keys.dtx
+++ b/l3kernel/l3keys.dtx
@@ -3358,6 +3358,7 @@
       { \prg_return_true: }
       { \prg_return_false: }
   }
+\prg_generate_conditional_variant:Nnn \keys_if_exist:nn { nx } { T , F , TF }
 %    \end{macrocode}
 % \end{macro}
 %