diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index 61523dbf4a2..83c59bdc0c2 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -809,6 +809,7 @@ function linkProjects_mame_mess(_target, _subtarget)
 		"robotron",
 		"rockwell",
 		"roland",
+		"rolm",
 		"sage",
 		"samcoupe",
 		"samsung",
@@ -2361,6 +2362,11 @@ files {
 	MAME_DIR .. "src/mame/drivers/tb303.cpp",
 }
 
+createMESSProjects(_target, _subtarget, "rolm")
+files {
+	MAME_DIR .. "src/mame/drivers/r9751.cpp",
+}
+
 createMESSProjects(_target, _subtarget, "rockwell")
 files {
 	MAME_DIR .. "src/mame/drivers/aim65.cpp",
@@ -3121,7 +3127,6 @@ files {
 	MAME_DIR .. "src/mame/drivers/pulsar.cpp",
 	MAME_DIR .. "src/mame/drivers/pv9234.cpp",
 	MAME_DIR .. "src/mame/drivers/qtsbc.cpp",
-	MAME_DIR .. "src/mame/drivers/r9751.cpp",
 	MAME_DIR .. "src/mame/drivers/rd100.cpp",
 	MAME_DIR .. "src/mame/drivers/rvoice.cpp",
 	MAME_DIR .. "src/mame/drivers/sacstate.cpp",
diff --git a/src/devices/machine/pdc.h b/src/devices/machine/pdc.h
index aae7ca669a5..ac085ea02cd 100644
--- a/src/devices/machine/pdc.h
+++ b/src/devices/machine/pdc.h
@@ -38,9 +38,9 @@ public:
 	pdc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
         /* Optional information overrides */
-        virtual machine_config_constructor device_mconfig_additions() const;
-	virtual ioport_constructor device_input_ports() const; //override;
-	virtual const rom_entry *device_rom_region() const;
+        virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual ioport_constructor device_input_ports() const override;
+	virtual const rom_entry *device_rom_region() const override;
 
 	/* Callbacks */
 	template<class _Object> static devcb_base &m68k_r_callback(device_t &device, _Object object) { return downcast<pdc_device &>(device).m_m68k_r_cb.set_callback(object); }
@@ -85,8 +85,8 @@ public:
 	UINT32 fdd_68k_dma_address; /* FDD <-> m68k DMA read/write address */
 protected:
         /* Device-level overrides */
-        virtual void device_start();
-        virtual void device_reset();
+        virtual void device_start() override;
+        virtual void device_reset() override;
 
 	/* Protected variables */
 	//UINT32 fdd_68k_dma_address;
diff --git a/src/mame/drivers/r9751.cpp b/src/mame/drivers/r9751.cpp
index efc6461a837..cfe23e3d76d 100644
--- a/src/mame/drivers/r9751.cpp
+++ b/src/mame/drivers/r9751.cpp
@@ -99,7 +99,7 @@ private:
 	// functions
 	UINT32 swap_uint32( UINT32 val );
 
-	virtual void machine_reset();
+	virtual void machine_reset() override;
 };