diff --git a/board/socrates/socrates.c b/board/socrates/socrates.c
index d83dc7d..df9696e 100644
--- a/board/socrates/socrates.c
+++ b/board/socrates/socrates.c
@@ -156,7 +156,7 @@
 	uint lcrr = CONFIG_SYS_LBC_LCRR;
 
 	get_sys_info (&sysinfo);
-	clkdiv = lbc->lcrr & 0x0f;
+	clkdiv = lbc->lcrr & LCRR_CLKDIV;
 	lbc_mhz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	/* Disable PLL bypass for Local Bus Clock >= 66 MHz */