diff --git a/src/mame/drivers/cv1k.cpp b/src/mame/drivers/cv1k.cpp
index adbb12d4135..b8bef970c31 100644
--- a/src/mame/drivers/cv1k.cpp
+++ b/src/mame/drivers/cv1k.cpp
@@ -477,7 +477,7 @@ void cv1k_state::cv1k(machine_config &config)
 
 	/* video hardware */
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
-	screen.set_refresh(HZ_TO_ATTOSECONDS(60.02)); // measured from ibara PCB rates - 60.02Hz, 262 total lines
+	screen.set_refresh(HZ_TO_ATTOSECONDS(60.024)); // measured from ibara PCB rates - 60.024Hz, 262 total lines
 	screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
 	screen.set_size(512, 512);
 	screen.set_visarea(0, 320-1, 0, 240-1);