1 files changed, 1 insertions, 0 deletions

diff --git a/crypto/src/crypto/signers/ECDsaSigner.cs b/crypto/src/crypto/signers/ECDsaSigner.cs

index 0c6117ebb..520507b8c 100644
--- a/crypto/src/crypto/signers/ECDsaSigner.cs
+++ b/crypto/src/crypto/signers/ECDsaSigner.cs
@@ -221,6 +221,7 @@ namespace Org.BouncyCastle.Crypto.Signers
             {
                 case ECCurve.COORD_HOMOGENEOUS:
                 case ECCurve.COORD_LAMBDA_PROJECTIVE:
+                case ECCurve.COORD_SKEWED:
                     return p.GetZCoord(0);
                 case ECCurve.COORD_JACOBIAN:
                 case ECCurve.COORD_JACOBIAN_CHUDNOVSKY: