diff --git a/eccrypto.h b/eccrypto.h
index 98ee68c2..a3d15e95 100644
--- a/eccrypto.h
+++ b/eccrypto.h
@@ -321,12 +321,10 @@ CRYPTOPP_DLL_TEMPLATE_CLASS DL_GroupParameters_EC<ECP>;
 CRYPTOPP_DLL_TEMPLATE_CLASS DL_GroupParameters_EC<EC2N>;
 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKeyImpl<DL_GroupParameters_EC<ECP> >;
 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKeyImpl<DL_GroupParameters_EC<EC2N> >;
-CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKeyImpl<DL_GroupParameters_EC<ECPM> >;
 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKey_EC<ECP>;
 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PublicKey_EC<EC2N>;
 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKeyImpl<DL_GroupParameters_EC<ECP> >;
 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKeyImpl<DL_GroupParameters_EC<EC2N> >;
-CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKeyImpl<DL_GroupParameters_EC<ECPM> >;
 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKey_EC<ECP>;
 CRYPTOPP_DLL_TEMPLATE_CLASS DL_PrivateKey_EC<EC2N>;
 CRYPTOPP_DLL_TEMPLATE_CLASS DL_Algorithm_GDSA<ECP::Point>;