diff --git a/src/mame/drivers/psikyo4.c b/src/mame/drivers/psikyo4.c
index b52d1b7a144..f3fe3e09fbd 100644
--- a/src/mame/drivers/psikyo4.c
+++ b/src/mame/drivers/psikyo4.c
@@ -945,6 +945,11 @@ DRIVER_INIT_MEMBER(psikyo4_state,hotgmck)
 	UINT8 *RAM = memregion("maincpu")->base();
 	membank("bank1")->set_base(&RAM[0x100000]);
 	install_hotgmck_pcm_bank();    // Banked PCM ROM
+
+	UINT32 *rom = (UINT32 *)memregion("maincpu")->base();
+	m_maincpu->sh2drc_add_fastram(0x00000000, 0x000fffff, 1, rom);
+	m_maincpu->sh2drc_add_fastram(0x03000000, 0x030037ff, 0, &m_spriteram[0]);
+	m_maincpu->sh2drc_add_fastram(0x06000000, 0x060fffff, 0, &m_ram[0]);
 }
 
 
diff --git a/src/mame/includes/psikyo4.h b/src/mame/includes/psikyo4.h
index a147760b2bb..d84ce992045 100644
--- a/src/mame/includes/psikyo4.h
+++ b/src/mame/includes/psikyo4.h
@@ -41,7 +41,7 @@ public:
 	double         m_oldbrt2;
 
 	/* devices */
-	required_device<cpu_device> m_maincpu;
+	required_device<sh2_device> m_maincpu;
 	required_device<eeprom_serial_93cxx_device> m_eeprom;
 	required_device<gfxdecode_device> m_gfxdecode;