diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 5db461db63cc..19f583e18402 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -15,6 +15,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/magic.h>
 #include <asm/processor.h>
 #include <asm/page.h>
 #include <asm/mmu.h>
@@ -717,6 +718,9 @@ start_here:
 	/* stack */
 	lis	r1,init_thread_union@ha
 	addi	r1,r1,init_thread_union@l
+	lis	r0, STACK_END_MAGIC@h
+	ori	r0, r0, STACK_END_MAGIC@l
+	stw	r0, 0(r1)
 	li	r0,0
 	stwu	r0,THREAD_SIZE-STACK_FRAME_OVERHEAD(r1)