diff --git a/src/mess/drivers/pc.c b/src/mess/drivers/pc.c
index a7129dc4b94..51e93f05786 100644
--- a/src/mess/drivers/pc.c
+++ b/src/mess/drivers/pc.c
@@ -299,7 +299,7 @@ MACHINE_CONFIG_END
 
 static MACHINE_CONFIG_DERIVED(bondwell, pccga)
 	MCFG_DEVICE_REMOVE("maincpu")
-	MCFG_CPU_PC(pc8, pc8, I8088, 12000000)
+	MCFG_CPU_PC(pc8, pc8, I8088, 4772720) // turbo?
 MACHINE_CONFIG_END
 
 static MACHINE_CONFIG_DERIVED(mk88, poisk2)