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-rw-r--r--src/mame/drivers/system1.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mame/drivers/system1.cpp b/src/mame/drivers/system1.cpp
index 2c6c3482db4..19d1995ad98 100644
--- a/src/mame/drivers/system1.cpp
+++ b/src/mame/drivers/system1.cpp
@@ -228,8 +228,8 @@ seem to have access to.
#include "speaker.h"
-#define MASTER_CLOCK XTAL_20MHz
-#define SOUND_CLOCK XTAL_8MHz
+#define MASTER_CLOCK XTAL(20'000'000)
+#define SOUND_CLOCK XTAL(8'000'000)
/*************************************