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-rw-r--r--src/mame/drivers/williams.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mame/drivers/williams.cpp b/src/mame/drivers/williams.cpp
index cb89505a767..d4c887c765a 100644
--- a/src/mame/drivers/williams.cpp
+++ b/src/mame/drivers/williams.cpp
@@ -510,8 +510,8 @@ Reference video: https://www.youtube.com/watch?v=R5OeC6Wc_yI
#include "speaker.h"
-#define MASTER_CLOCK (XTAL_12MHz)
-#define SOUND_CLOCK (XTAL_3_579545MHz)
+#define MASTER_CLOCK (XTAL(12'000'000))
+#define SOUND_CLOCK (XTAL(3'579'545))