diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index fcbe8b640ffba57f04a35c986728bf850717bb6c..c8d216357865dda3e22bd503df478055b3d888b9 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -12,6 +12,7 @@
 #ifndef _LINUX_ETHTOOL_H
 #define _LINUX_ETHTOOL_H
 
+#include <linux/types.h>
 
 /* This should work for both 32 and 64 bit userland. */
 struct ethtool_cmd {