diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index 30542e833ebe..f4a98d9c5913 100644
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -4,6 +4,7 @@
 //
 // Copyright 2018, Michael Ellerman, IBM Corporation.
 
+#include <linux/cpu.h>
 #include <linux/kernel.h>
 #include <linux/debugfs.h>
 #include <linux/device.h>