Index: kernel/arch/sparc64/src/mm/sun4u/frame.c
===================================================================
--- kernel/arch/sparc64/src/mm/sun4u/frame.c	(revision 598f90e95d4285118ba60723e23a04384ddcfc5e)
+++ kernel/arch/sparc64/src/mm/sun4u/frame.c	(revision 0b4a67a31961a80515a7b28d5b2e27fbb8f7249d)
@@ -41,5 +41,5 @@
 #include <macros.h>
 
-uintptr_t last_frame = NULL;
+uintptr_t last_frame = (uintptr_t) NULL;
 
 /** Create memory zones according to information stored in memmap.