Index: boot/arch/ppc32/include/asm.h
===================================================================
--- boot/arch/ppc32/include/asm.h	(revision d8bb8213173f9665d9d1f2f90ef7d87a8eb96e7c)
+++ boot/arch/ppc32/include/asm.h	(revision 022d72ffd929dc62c3c13426a1c69f6b87e5cb68)
@@ -35,5 +35,5 @@
 extern void jump_to_kernel(void *, void *, size_t, void *)
     __attribute__((noreturn));
-extern void real_mode();
+extern void real_mode(void);
 
 #endif