From 722badbcc9d3453b18df83c95a935c095a23d4a6 Mon Sep 17 00:00:00 2001
From: Tim Vaughan <tgvaughan@gmail.com>
Date: Sun, 29 Oct 2017 21:23:43 +0100
Subject: [PATCH] Fixed another define-var bug.

---
 src/scheme.4th | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/scheme.4th b/src/scheme.4th
index ebbf159..68c3b67 100644
--- a/src/scheme.4th
+++ b/src/scheme.4th
@@ -497,15 +497,16 @@ hide var
 
 : define-var ( var val env -- )
     first-frame ( var val frame )
-    2rot 2over 2over ( val frame var frame var )
+    2rot 2swap 2over 2over ( val var frame var frame )
 
     get-vals-frame nil? if
-        2drop ( val frame var )
-        -2rot add-binding
+        2drop
+        -2rot 2swap 2rot
+        add-binding
     else
-        ( val frame var vals )
+        ( val var frame vals )
         2swap 2drop 2swap 2drop
-        cons
+        set-car!
     then
 ;
 
-- 
2.20.1