diff --git a/src/Language/Brainfuck/Instruction.hs b/src/Language/Brainfuck/Instruction.hs
index 80a52aa..ef6d324 100644
--- a/src/Language/Brainfuck/Instruction.hs
+++ b/src/Language/Brainfuck/Instruction.hs
@@ -21,7 +21,7 @@ data Instruction
 
 instance Arbitrary Instruction where
   arbitrary :: Gen Instruction
-  arbitrary = Gen.oneof $
+  arbitrary = Gen.oneof 
     [ pure Increment
     , pure Decrement
     , pure MoveLeft