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-rw-r--r--src/mame/drivers/alien.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/alien.cpp b/src/mame/drivers/alien.cpp
index 2f22185b43a..a2dbf1822a4 100644
--- a/src/mame/drivers/alien.cpp
+++ b/src/mame/drivers/alien.cpp
@@ -28,7 +28,7 @@
#include "screen.h"
#include "speaker.h"
-#define MASTER_CLOCK XTAL_200MHz
+#define MASTER_CLOCK XTAL(200'000'000)
class alien_state : public driver_device
{