diff --git a/arch/sparc/include/asm/system_32.h b/arch/sparc/include/asm/system_32.h
index 4e18ef2..8623fc4 100644
--- a/arch/sparc/include/asm/system_32.h
+++ b/arch/sparc/include/asm/system_32.h
@@ -49,6 +49,7 @@
 extern void sun_do_break(void);
 extern int serial_console;
 extern int stop_a_enabled;
+extern int scons_pwroff;
 
 static inline int con_is_present(void)
 {
diff --git a/arch/sparc/include/asm/system_64.h b/arch/sparc/include/asm/system_64.h
index 98acb3b9..8759f2a 100644
--- a/arch/sparc/include/asm/system_64.h
+++ b/arch/sparc/include/asm/system_64.h
@@ -117,6 +117,7 @@
 
 extern void sun_do_break(void);
 extern int stop_a_enabled;
+extern int scons_pwroff;
 
 extern void fault_in_user_windows(void);
 extern void synchronize_user_stack(void);
diff --git a/arch/sparc64/kernel/reboot.c b/arch/sparc64/kernel/reboot.c
index 11f2496..ef89d3d 100644
--- a/arch/sparc64/kernel/reboot.c
+++ b/arch/sparc64/kernel/reboot.c
@@ -7,6 +7,7 @@
 #include <linux/module.h>
 #include <linux/pm.h>
 
+#include <asm/system.h>
 #include <asm/oplib.h>
 #include <asm/prom.h>
 
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index eda6162..da51520 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -119,9 +119,7 @@
 #endif
 
 #ifdef CONFIG_SPARC
-extern char reboot_command [];
-extern int stop_a_enabled;
-extern int scons_pwroff;
+#include <asm/system.h>
 #endif
 
 #ifdef __hppa__