1 files changed, 1 insertions, 1 deletions
diff --git a/AST.hs b/AST.hs
index a096227..5fd2518 100644
--- a/AST.hs
+++ b/AST.hs
@@ -19,7 +19,7 @@ data Value
     | VLet [(Name, Value)] Value
     | VBuiltin String
     | VEllipsis
-  deriving (Eq)
+  deriving (Eq, Ord)
 
 
 instance Show Program where