From 1ff74f4f6cfbd906df1b822386e5506bedc78f3a Mon Sep 17 00:00:00 2001
From: MadMaurice <madmaurice@zom.bi>
Date: Tue, 6 Apr 2021 22:10:55 +0200
Subject: [PATCH] Fix grammar

---
 lib/Minilisp.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Minilisp.pm b/lib/Minilisp.pm
index 4d87069..6e360bf 100644
--- a/lib/Minilisp.pm
+++ b/lib/Minilisp.pm
@@ -157,7 +157,7 @@ sub ctx_assign {
       $ctx = $ctx->{base};
     }
 
-  die "Variable $identifier does not defined" unless defined $ctx;
+  die "Variable $identifier is not defined" unless defined $ctx;
 
   $ctx->{vars}->{$identifier} = $value;
 }