1 files changed, 3 insertions, 1 deletions
diff --git a/src/Test/VeriFuzz/Circuit.hs b/src/Test/VeriFuzz/Circuit.hs
index d934a3d..dc0ec81 100644
--- a/src/Test/VeriFuzz/Circuit.hs
+++ b/src/Test/VeriFuzz/Circuit.hs
@@ -12,7 +12,7 @@ Definition of the circuit graph.
 
 module Test.VeriFuzz.Circuit where
 
-import           Data.Graph.Inductive
+import           Data.Graph.Inductive (Gr, LNode)
 import           System.Random
 import           Test.QuickCheck
 
@@ -25,6 +25,8 @@ data Gate = And
 -- | Newtype for the Circuit which implements a Graph from fgl.
 newtype Circuit = Circuit { getCircuit :: Gr Gate () }
 
+newtype CNode = CNode { getCNode :: LNode Gate }
+
 instance Random Gate where
   randomR (a, b) g =
     case randomR (fromEnum a, fromEnum b) g of