diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c
index fea310e..435ef10 100644
--- a/arch/powerpc/lib/board.c
+++ b/arch/powerpc/lib/board.c
@@ -521,9 +521,8 @@
 	addr_sp -= 16;
 	addr_sp &= ~0xF;
 	s = (ulong *) addr_sp;
-	*s-- = 0;
-	*s-- = 0;
-	addr_sp = (ulong) s;
+	*s = 0; /* Terminate back chain */
+	*++s = 0; /* NULL return address */
 	debug("Stack Pointer at: %08lx\n", addr_sp);
 
 	/*