diff --git a/include/uapi/linux/if_pppox.h b/include/uapi/linux/if_pppox.h
index e128769331b5a7c6be4a10cf44c262be68a65772..473c3c45e3d84521663ecde49fb25f86436d8d46 100644
--- a/include/uapi/linux/if_pppox.h
+++ b/include/uapi/linux/if_pppox.h
@@ -21,6 +21,7 @@
 #include <asm/byteorder.h>
 
 #include <linux/socket.h>
+#include <linux/if.h>
 #include <linux/if_ether.h>
 #include <linux/if_pppol2tp.h>