diff --git a/drivers/staging/easycap/easycap.h b/drivers/staging/easycap/easycap.h
index 25961c23dc0f..884263b2775d 100644
--- a/drivers/staging/easycap/easycap.h
+++ b/drivers/staging/easycap/easycap.h
@@ -75,6 +75,7 @@
 #include <linux/errno.h>
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/module.h>
 #include <linux/kref.h>
 #include <linux/usb.h>