diff --git a/arch/powerpc/boot/treeboot-walnut.c b/arch/powerpc/boot/treeboot-walnut.c
index 3adf2d0..6be76b7 100644
--- a/arch/powerpc/boot/treeboot-walnut.c
+++ b/arch/powerpc/boot/treeboot-walnut.c
@@ -57,8 +57,8 @@
 	}
 
 	/* setup the timebase clock to tick at the cpu frequency */
-	cpc0_cr1 = cpc0_cr1 & ~ 0x00800000;
-	mtdcr(DCRN_CPC0_CR1, cpc0_cr1);
+	cpc0_cr1 = cpc0_cr1 & ~0x00800000;
+	mtdcr(DCRN_405_CPC0_CR1, cpc0_cr1);
 	tb = cpu;
 
 	dt_fixup_cpu_clocks(cpu, tb, 0);