diff --git a/drivers/input/ff-core.c b/drivers/input/ff-core.c
index 4c01464..72c63e5 100644
--- a/drivers/input/ff-core.c
+++ b/drivers/input/ff-core.c
@@ -28,6 +28,7 @@
 #include <linux/input.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
+#include <linux/sched.h>
 
 /*
  * Check that the effect_id is a valid effect and whether the user