diff --git a/arch/arm/mach-shmobile/platsmp-apmu.c b/arch/arm/mach-shmobile/platsmp-apmu.c
index 4e54512bee30..bcf4cc51b926 100644
--- a/arch/arm/mach-shmobile/platsmp-apmu.c
+++ b/arch/arm/mach-shmobile/platsmp-apmu.c
@@ -170,7 +170,7 @@ static inline void cpu_enter_lowpower_a15(void)
 	dsb();
 }
 
-void shmobile_smp_apmu_cpu_shutdown(unsigned int cpu)
+static void shmobile_smp_apmu_cpu_shutdown(unsigned int cpu)
 {
 
 	/* Select next sleep mode using the APMU */