diff --git a/include/linux/input.h b/include/linux/input.h
index 0ccfc30cd40f7696e0b9e863272f82fb8e42e0f0..9ee67b4b2b482397534f1a93d55c8beb5b491f5c 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -890,7 +890,7 @@ struct ff_periodic_effect {
 	struct ff_envelope envelope;
 
 	__u32 custom_len;
-	__s16 *custom_data;
+	__s16 __user *custom_data;
 };
 
 /**