diff --git a/src/key.h b/src/key.h
--- a/src/key.h
+++ b/src/key.h
@@ -174,23 +174,6 @@
     bool Derive(CExtKey &out, unsigned int nChild) const;
     CExtPubKey Neuter() const;
     void SetSeed(const uint8_t *seed, unsigned int nSeedLen);
-    template <typename Stream> void Serialize(Stream &s) const {
-        unsigned int len = BIP32_EXTKEY_SIZE;
-        ::WriteCompactSize(s, len);
-        uint8_t code[BIP32_EXTKEY_SIZE];
-        Encode(code);
-        s.write((const char *)&code[0], len);
-    }
-    template <typename Stream> void Unserialize(Stream &s) {
-        unsigned int len = ::ReadCompactSize(s);
-        if (len != BIP32_EXTKEY_SIZE) {
-            throw std::runtime_error("Invalid extended key size\n");
-        }
-
-        uint8_t code[BIP32_EXTKEY_SIZE];
-        s.read((char *)&code[0], len);
-        Decode(code);
-    }
 
     CExtKey() = default;
 };
diff --git a/src/pubkey.h b/src/pubkey.h
--- a/src/pubkey.h
+++ b/src/pubkey.h
@@ -206,29 +206,6 @@
     void Decode(const uint8_t code[BIP32_EXTKEY_SIZE]);
     bool Derive(CExtPubKey &out, unsigned int nChild) const;
 
-    void Serialize(CSizeComputer &s) const {
-        // Optimized implementation for ::GetSerializeSize that avoids copying.
-        // add one byte for the size (compact int)
-        s.seek(BIP32_EXTKEY_SIZE + 1);
-    }
-    template <typename Stream> void Serialize(Stream &s) const {
-        unsigned int len = BIP32_EXTKEY_SIZE;
-        ::WriteCompactSize(s, len);
-        uint8_t code[BIP32_EXTKEY_SIZE];
-        Encode(code);
-        s.write((const char *)&code[0], len);
-    }
-    template <typename Stream> void Unserialize(Stream &s) {
-        unsigned int len = ::ReadCompactSize(s);
-        if (len != BIP32_EXTKEY_SIZE) {
-            throw std::runtime_error("Invalid extended key size\n");
-        }
-
-        uint8_t code[BIP32_EXTKEY_SIZE];
-        s.read((char *)&code[0], len);
-        Decode(code);
-    }
-
     CExtPubKey() = default;
 };
 
diff --git a/src/test/bip32_tests.cpp b/src/test/bip32_tests.cpp
--- a/src/test/bip32_tests.cpp
+++ b/src/test/bip32_tests.cpp
@@ -125,22 +125,6 @@
         }
         key = keyNew;
         pubkey = pubkeyNew;
-
-        CDataStream ssPub(SER_DISK, CLIENT_VERSION);
-        ssPub << pubkeyNew;
-        BOOST_CHECK(ssPub.size() == 75);
-
-        CDataStream ssPriv(SER_DISK, CLIENT_VERSION);
-        ssPriv << keyNew;
-        BOOST_CHECK(ssPriv.size() == 75);
-
-        CExtPubKey pubCheck;
-        CExtKey privCheck;
-        ssPub >> pubCheck;
-        ssPriv >> privCheck;
-
-        BOOST_CHECK(pubCheck == pubkeyNew);
-        BOOST_CHECK(privCheck == keyNew);
     }
 }