diff --git a/scripts/src/machine.lua b/scripts/src/machine.lua
index 0b38879b20c..009b75c6e7d 100644
--- a/scripts/src/machine.lua
+++ b/scripts/src/machine.lua
@@ -1709,6 +1709,8 @@ if (MACHINES["PCI"]~=null) then
 		MAME_DIR .. "src/devices/machine/lpc-pit.h",
 		MAME_DIR .. "src/devices/machine/vrc4373.cpp",
 		MAME_DIR .. "src/devices/machine/vrc4373.h",
+		MAME_DIR .. "src/devices/machine/gt64xxx.cpp",
+		MAME_DIR .. "src/devices/machine/gt64xxx.h",
 	}
 end
 
diff --git a/src/devices/machine/gt64xxx.h b/src/devices/machine/gt64xxx.h
index be1539ab049..a31674d59e8 100644
--- a/src/devices/machine/gt64xxx.h
+++ b/src/devices/machine/gt64xxx.h
@@ -176,9 +176,9 @@ class gt64xxx_device : public pci_host_device {
 public:
 	gt64xxx_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
-	virtual void reset_all_mappings();
+	virtual void reset_all_mappings() override;
 	virtual void map_extra(UINT64 memory_window_start, UINT64 memory_window_end, UINT64 memory_offset, address_space *memory_space,
-							UINT64 io_window_start, UINT64 io_window_end, UINT64 io_offset, address_space *io_space);
+							UINT64 io_window_start, UINT64 io_window_end, UINT64 io_offset, address_space *io_space) override;
 
 	void set_cpu_tag(const char *tag) { cpu_tag = tag;}
 	void set_cpu_tag(const UINT32 clock) { m_clock = clock;}
@@ -187,7 +187,7 @@ public:
 	void set_autoconfig(const int autoconfig) {m_autoconfig = autoconfig;}
 	void set_irq_info(const int irq_num) {m_irq_num = irq_num;}
 	
-	virtual DECLARE_ADDRESS_MAP(config_map, 32);
+	virtual DECLARE_ADDRESS_MAP(config_map, 32) override;
 
 	// pci bus
 	DECLARE_READ32_MEMBER(  pci_config_r);
@@ -218,9 +218,9 @@ public:
 
 protected:
 	address_space *m_cpu_space;
-	virtual const address_space_config *memory_space_config(address_spacenum spacenum) const;
-	virtual void device_start();
-	virtual void device_reset();
+	virtual const address_space_config *memory_space_config(address_spacenum spacenum) const override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 private:
 	mips3_device *m_cpu;