diff --git a/include/linux/can/length.h b/include/linux/can/length.h
index 6995092b774e..69336549d24f 100644
--- a/include/linux/can/length.h
+++ b/include/linux/can/length.h
@@ -6,6 +6,9 @@
 #ifndef _CAN_LENGTH_H
 #define _CAN_LENGTH_H
 
+#include <linux/can.h>
+#include <linux/can/netlink.h>
+
 /*
  * Size of a Classical CAN Standard Frame
  *