diff --git a/sys/sparc64/include/cpu.h b/sys/sparc64/include/cpu.h
index 1634477f4833..401f39bfccc6 100644
--- a/sys/sparc64/include/cpu.h
+++ b/sys/sparc64/include/cpu.h
@@ -53,8 +53,8 @@ extern	char btext[];
 extern	char etext[];
 
 void	cheetah_init(u_int cpu_impl);
-void	cpu_halt(void);
-void	cpu_reset(void);
+void	cpu_halt(void) __dead2;
+void	cpu_reset(void) __dead2;
 void	fork_trampoline(void);
 void	swi_vm(void *v);
 void	zeus_init(u_int cpu_impl);