diff --git a/Crypto/ECC.hs b/Crypto/ECC.hs
index 0a8c637..bf1039e 100644
--- a/Crypto/ECC.hs
+++ b/Crypto/ECC.hs
@@ -79,6 +79,9 @@ class EllipticCurve curve => EllipticCurveArith curve where
     -- | Scalar Multiplication on a curve
     pointSmul :: Scalar curve -> Point curve -> Point curve
 
+--   -- | Scalar Inverse
+--   scalarInverse :: Scalar curve -> Scalar curve
+
 -- | P256 Curve
 --
 -- also known as P256