diff --git a/reactos/ntoskrnl/ke/powerpc/kiinit.c b/reactos/ntoskrnl/ke/powerpc/kiinit.c
index a151c92bb8a..84e132156ae 100644
--- a/reactos/ntoskrnl/ke/powerpc/kiinit.c
+++ b/reactos/ntoskrnl/ke/powerpc/kiinit.c
@@ -141,6 +141,9 @@ KiInitializeKernel(IN PKPROCESS InitProcess,
         /* Set the current MP Master KPRCB to the Boot PRCB */
         Prcb->MultiThreadSetMaster = Prcb;
 
+        /* Lower to APC_LEVEL */
+        KeLowerIrql(APC_LEVEL);
+
         /* Initialize portable parts of the OS */
         KiInitSystem();