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-rw-r--r--Thue/Parser.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/Thue/Parser.hs b/Thue/Parser.hs
index 948035d..d9db99d 100644
--- a/Thue/Parser.hs
+++ b/Thue/Parser.hs
@@ -12,7 +12,7 @@ import Text.ParserCombinators.Parsec
data ThueProgram = ThueProgram { thueRules :: [ThueRule]
, thueInitialState :: ThueState }
- deriving (Show)
+ deriving (Show, Eq)
data ThueRule = ThueRule { original :: ThueState