diff --git a/src/key.h b/src/key.h
--- a/src/key.h
+++ b/src/key.h
@@ -142,7 +142,8 @@
     bool VerifyPubKey(const CPubKey &vchPubKey) const;
 
     //! Load private key and check that public key matches.
-    bool Load(CPrivKey &privkey, CPubKey &vchPubKey, bool fSkipCheck);
+    bool Load(const CPrivKey &privkey, const CPubKey &vchPubKey,
+              bool fSkipCheck);
 };
 
 struct CExtKey {
diff --git a/src/key.cpp b/src/key.cpp
--- a/src/key.cpp
+++ b/src/key.cpp
@@ -259,7 +259,7 @@
     return true;
 }
 
-bool CKey::Load(CPrivKey &privkey, CPubKey &vchPubKey,
+bool CKey::Load(const CPrivKey &privkey, const CPubKey &vchPubKey,
                 bool fSkipCheck = false) {
     if (!ec_privkey_import_der(secp256k1_context_sign, (uint8_t *)begin(),
                                privkey.data(), privkey.size()))