diff --git a/src/mame/drivers/jubilee.cpp b/src/mame/drivers/jubilee.cpp
index be8a61c57da..bb53eeaa07e 100644
--- a/src/mame/drivers/jubilee.cpp
+++ b/src/mame/drivers/jubilee.cpp
@@ -201,7 +201,7 @@
 #include "screen.h"
 
 #define MASTER_CLOCK    XTAL(6'000'000)              /* confirmed */
-#define CPU_CLOCK      (MASTER_CLOCK / 2)      /* guess */
+#define CPU_CLOCK       MASTER_CLOCK           /* guess */
 #define CRTC_CLOCK     (MASTER_CLOCK / 8)      /* guess */