diff --git a/arch/arm64/include/asm/cpuidle.h b/arch/arm64/include/asm/cpuidle.h
index 0710654631e789121f7b0d2247b485ebf585685a..c60643f14cda97e7ba6dd9676f10b133af4b0627 100644
--- a/arch/arm64/include/asm/cpuidle.h
+++ b/arch/arm64/include/asm/cpuidle.h
@@ -1,6 +1,8 @@
 #ifndef __ASM_CPUIDLE_H
 #define __ASM_CPUIDLE_H
 
+#include <asm/proc-fns.h>
+
 #ifdef CONFIG_CPU_IDLE
 extern int cpu_init_idle(unsigned int cpu);
 extern int cpu_suspend(unsigned long arg);