diff --git a/drivers/input/ff-memless.c b/drivers/input/ff-memless.c
index f967008..1d881c9 100644
--- a/drivers/input/ff-memless.c
+++ b/drivers/input/ff-memless.c
@@ -25,6 +25,7 @@
 
 #define debug(format, arg...) pr_debug("ff-memless: " format "\n", ## arg)
 
+#include <linux/slab.h>
 #include <linux/input.h>
 #include <linux/module.h>
 #include <linux/mutex.h>