diff --git a/sys/powerpc/powerpc/mp_machdep.c b/sys/powerpc/powerpc/mp_machdep.c
index 49e259ad50b..10a87395b3c 100644
--- a/sys/powerpc/powerpc/mp_machdep.c
+++ b/sys/powerpc/powerpc/mp_machdep.c
@@ -78,7 +78,7 @@ machdep_ap_bootstrap(void)
 	__asm __volatile("msync; isync");
 
 	while (ap_letgo == 0)
-		__asm __volatile("or 27,27,27");
+		__asm __volatile("or 31,31,31");
 	__asm __volatile("or 6,6,6");
 
 	/*