diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 18518ba..985da11 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -19,6 +19,7 @@
 #include <linux/kthread.h>
 #include <linux/highmem.h>
 #include <linux/firmware.h>
+#include <linux/slab.h>
 
 #define to_dev(obj) container_of(obj, struct device, kobj)