diff --git a/net/netfilter/xt_IDLETIMER.c b/net/netfilter/xt_IDLETIMER.c
index e11090a0675c..be1f22e13545 100644
--- a/net/netfilter/xt_IDLETIMER.c
+++ b/net/netfilter/xt_IDLETIMER.c
@@ -36,6 +36,7 @@
 #include <linux/netfilter.h>
 #include <linux/netfilter/x_tables.h>
 #include <linux/netfilter/xt_IDLETIMER.h>
+#include <linux/kdev_t.h>
 #include <linux/kobject.h>
 #include <linux/workqueue.h>
 #include <linux/sysfs.h>