diff --git a/src/command_aux.h b/src/command_aux.h
index 924f9a2187..2efafadb85 100644
--- a/src/command_aux.h
+++ b/src/command_aux.h
@@ -55,7 +55,7 @@ struct CommandSerialisationBuffer : public BufferSerialisationHelper<CommandSeri
 struct CommandAuxiliarySerialised : public CommandAuxiliaryBase {
 	std::vector<byte> serialised_data;
 
-	CommandAuxiliaryBase *Clone() const
+	CommandAuxiliaryBase *Clone() const override
 	{
 		return new CommandAuxiliarySerialised(*this);
 	}
@@ -69,7 +69,7 @@ template <typename T>
 struct CommandAuxiliarySerialisable : public CommandAuxiliaryBase {
 	virtual opt::optional<span<const uint8>> GetDeserialisationSrc() const override { return {}; }
 
-	CommandAuxiliaryBase *Clone() const
+	CommandAuxiliaryBase *Clone() const override
 	{
 		return new T(*static_cast<const T *>(this));
 	}