diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
index 956571526a57..7ccb9236e8b4 100644
--- a/arch/powerpc/platforms/powermac/setup.c
+++ b/arch/powerpc/platforms/powermac/setup.c
@@ -454,6 +454,9 @@ static int initializing = 1;
 
 static int pmac_late_init(void)
 {
+	if (!machine_is(powermac))
+		return -ENODEV;
+
 	initializing = 0;
 	/* this is udbg (which is __init) and we can later use it during
 	 * cpu hotplug (in smp_core99_kick_cpu) */