diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c
index 40f72c2a4699..6b0711c15eca 100644
--- a/arch/powerpc/platforms/powermac/smp.c
+++ b/arch/powerpc/platforms/powermac/smp.c
@@ -739,7 +739,7 @@ static void __init smp_core99_setup(int ncpus)
 
 		/* XXX should get this from reg properties */
 		for (i = 1; i < ncpus; ++i)
-			smp_hw_index[i] = i;
+			set_hard_smp_processor_id(i, i);
 	}
 #endif