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Diffstat (limited to 'src/mame/drivers/atari_s1.cpp')
-rw-r--r--src/mame/drivers/atari_s1.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/atari_s1.cpp b/src/mame/drivers/atari_s1.cpp
index 36519754105..fde4c670d00 100644
--- a/src/mame/drivers/atari_s1.cpp
+++ b/src/mame/drivers/atari_s1.cpp
@@ -56,7 +56,7 @@ ToDo:
#include "atari_s1.lh"
-#define MASTER_CLK XTAL_4MHz / 4
+#define MASTER_CLK XTAL(4'000'000) / 4
#define DMA_CLK MASTER_CLK / 2
#define AUDIO_CLK DMA_CLK / 4
#define DMA_INT DMA_CLK / 128