diff --git a/board/freescale/mpc8540ads/mpc8540ads.c b/board/freescale/mpc8540ads/mpc8540ads.c
index a0b6fbd..9e3f677 100644
--- a/board/freescale/mpc8540ads/mpc8540ads.c
+++ b/board/freescale/mpc8540ads/mpc8540ads.c
@@ -133,7 +133,7 @@
 	 */
 
 	get_sys_info(&sysinfo);
-	clkdiv = lbc->lcrr & 0x0f;
+	clkdiv = lbc->lcrr & LCRR_CLKDIV;
 	lbc_hz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	if (lbc_hz < 66) {