diff --git a/arch/m68k/include/asm/m5272sim.h b/arch/m68k/include/asm/m5272sim.h
index 57ca4de..759c2b0 100644
--- a/arch/m68k/include/asm/m5272sim.h
+++ b/arch/m68k/include/asm/m5272sim.h
@@ -14,6 +14,7 @@
 
 #define	CPU_NAME		"COLDFIRE(m5272)"
 #define	CPU_INSTR_PER_JIFFY	3
+#define	MCF_BUSCLK		MCF_CLK
 
 #include <asm/m52xxacr.h>