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-rw-r--r--src/mame/ddr/c80.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/ddr/c80.cpp b/src/mame/ddr/c80.cpp
index d6105f039c1..638f4fd8fdc 100644
--- a/src/mame/ddr/c80.cpp
+++ b/src/mame/ddr/c80.cpp
@@ -71,7 +71,7 @@ namespace {
#define Z80PIO2_TAG "d12"
// You could use a piezo at 455 kHz, or a crystal 500 to 2500 kHz.
// Cassette successfully tested at 455 kHz
-#define MASTER_CLOCK 455000
+#define MASTER_CLOCK XTAL(455000)
class c80_state : public driver_device
{