diff --git a/libdevcrypto/CryptoPP.cpp b/libdevcrypto/CryptoPP.cpp
index 766ca485d..225f36dec 100644
--- a/libdevcrypto/CryptoPP.cpp
+++ b/libdevcrypto/CryptoPP.cpp
@@ -198,6 +198,9 @@ bool Secp256k1::verifySecret(Secret const& _s, Public& _p)
 
 void Secp256k1::agree(Secret const& _s, Public const& _r, h256& o_s)
 {
+	(void)_s;
+	(void)_r;
+	(void)o_s;
 	ECDH<ECP>::Domain d(m_oid);
 	assert(d.AgreedValueLength() == sizeof(o_s));
 	byte remote[65] = {0x04};
diff --git a/libsolidity/SourceReferenceFormatter.h b/libsolidity/SourceReferenceFormatter.h
index 8e3f126f0..98f1c745d 100644
--- a/libsolidity/SourceReferenceFormatter.h
+++ b/libsolidity/SourceReferenceFormatter.h
@@ -28,7 +28,7 @@
 namespace dev
 {
 
-class Exception; // forward
+struct Exception; // forward
 
 namespace solidity
 {