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-rw-r--r--src/mame/drivers/tempest.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mame/drivers/tempest.cpp b/src/mame/drivers/tempest.cpp
index d19c24c1a47..e6787d4d244 100644
--- a/src/mame/drivers/tempest.cpp
+++ b/src/mame/drivers/tempest.cpp
@@ -287,8 +287,8 @@ Note: Roms for Tempest Analog Vector-Generator PCB Assembly A037383-03 or A03738
#include "speaker.h"
-#define MASTER_CLOCK (XTAL_12_096MHz)
-#define CLOCK_3KHZ ((double)MASTER_CLOCK / 4096)
+#define MASTER_CLOCK (XTAL(12'096'000))
+#define CLOCK_3KHZ (MASTER_CLOCK / 4096)
#define TEMPEST_KNOB_P1_TAG "KNOBP1"
#define TEMPEST_KNOB_P2_TAG "KNOBP2"