diff --git a/src/primitives/transaction.h b/src/primitives/transaction.h
index a8a1ecf483029..b3af3648d1bd5 100644
--- a/src/primitives/transaction.h
+++ b/src/primitives/transaction.h
@@ -266,6 +266,7 @@ class CTransaction
     CTransaction(const CMutableTransaction &tx);
     CTransaction(CMutableTransaction &&tx);
 
+    CTransaction(const CTransaction& tx) = default;
     CTransaction& operator=(const CTransaction& tx);
 
     ADD_SERIALIZE_METHODS;