diff --git a/src/txdb.cpp b/src/txdb.cpp
--- a/src/txdb.cpp
+++ b/src/txdb.cpp
@@ -39,11 +39,19 @@
     explicit CoinEntry(const COutPoint *ptr)
         : outpoint(const_cast<COutPoint *>(ptr)), key(DB_COIN) {}
 
-    SERIALIZE_METHODS(CoinEntry, obj) {
-        TxId id = obj.outpoint->GetTxId();
-        uint32_t n = obj.outpoint->GetN();
-        READWRITE(obj.key, id, n);
-        SER_READ(obj, *obj.outpoint = COutPoint(id, n));
+    template <typename Stream> void Serialize(Stream &s) const {
+        s << key;
+        s << outpoint->GetTxId();
+        s << VARINT(outpoint->GetN());
+    }
+
+    template <typename Stream> void Unserialize(Stream &s) {
+        s >> key;
+        TxId id;
+        s >> id;
+        uint32_t n = 0;
+        s >> VARINT(n);
+        *outpoint = COutPoint(id, n);
     }
 };
 } // namespace