diff --git a/crates/compiler/builtins/roc/List.roc b/crates/compiler/builtins/roc/List.roc
index 1e07bb4094..0306f854fd 100644
--- a/crates/compiler/builtins/roc/List.roc
+++ b/crates/compiler/builtins/roc/List.roc
@@ -598,7 +598,7 @@ range = \start, end ->
         GT -> []
         EQ -> [start]
         LT ->
-            length = Num.intCast (start - end)
+            length = Num.intCast (end - start)
 
             rangeHelp (List.withCapacity length) start end