diff --git a/include/linux/dn.h b/include/linux/dn.h
index 02bba040fcfb..fe9990823193 100644
--- a/include/linux/dn.h
+++ b/include/linux/dn.h
@@ -1,6 +1,8 @@
 #ifndef _LINUX_DN_H
 #define _LINUX_DN_H
 
+#include <linux/types.h>
+
 /*
 
 	DECnet Data Structures and Constants