diff --git a/Crypto/Error/Types.hs b/Crypto/Error/Types.hs
index dff0c8b..edaf654 100644
--- a/Crypto/Error/Types.hs
+++ b/Crypto/Error/Types.hs
@@ -34,6 +34,10 @@ data CryptoError =
     | CryptoError_SecretKeyStructureInvalid
     | CryptoError_PublicKeySizeInvalid
     | CryptoError_SharedSecretSizeInvalid
+    -- elliptic cryptography error
+    | CryptoError_PointSizeInvalid
+    | CryptoError_PointFormatInvalid
+    | CryptoError_PointFormatUnsupported
     -- Message authentification error
     | CryptoError_MacKeyInvalid
     | CryptoError_AuthenticationTagSizeInvalid