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-rw-r--r--src/mess/includes/sms.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mess/includes/sms.h b/src/mess/includes/sms.h
index 4cc1ff2cecc..29f795942c4 100644
--- a/src/mess/includes/sms.h
+++ b/src/mess/includes/sms.h
@@ -31,6 +31,7 @@ public:
m_control_cpu(*this, "control"),
m_vdp(*this, "sms_vdp"),
m_eeprom(*this, "eeprom"),
+ m_ym(*this, "ym2413"),
m_main_scr(*this, "screen"),
m_is_gamegear(0),
m_is_region_japan(0),
@@ -47,7 +48,7 @@ public:
optional_device<cpu_device> m_control_cpu;
required_device<sega315_5124_device> m_vdp;
optional_device<eeprom_device> m_eeprom;
- device_t *m_ym;
+ optional_device<ym2413_device> m_ym;
required_device<screen_device> m_main_scr;
device_t *m_left_lcd;
device_t *m_right_lcd;