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-rw-r--r--src/mame/drivers/video21.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/video21.cpp b/src/mame/drivers/video21.cpp
index 1c9481d5ed6..3ef2c9a66b7 100644
--- a/src/mame/drivers/video21.cpp
+++ b/src/mame/drivers/video21.cpp
@@ -67,7 +67,7 @@ private:
required_device<cpu_device> m_maincpu;
required_shared_ptr<u8> m_p_videoram;
required_region_ptr<u8> m_p_chargen;
- optional_device<beep_device> m_beeper;
+ required_device<beep_device> m_beeper;
output_finder<6> m_lamps;
};