diff --git a/include/linux/stop_machine.h b/include/linux/stop_machine.h
index 2d04ea91676037e2c71bc8e1ff103253157888cd..c170edc3bf5f62d0c1cca31ae332c0a29c24389f 100644
--- a/include/linux/stop_machine.h
+++ b/include/linux/stop_machine.h
@@ -3,6 +3,7 @@
 
 #include <linux/cpu.h>
 #include <linux/cpumask.h>
+#include <linux/smp.h>
 #include <linux/list.h>
 #include <asm/system.h>