diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 8e484d660bc3..c94e71781b79 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -197,6 +197,7 @@ header-y += in6.h
 header-y += in_route.h
 header-y += sock_diag.h
 header-y += inet_diag.h
+header-y += unix_diag.h
 header-y += inotify.h
 header-y += input.h
 header-y += ioctl.h
diff --git a/include/linux/unix_diag.h b/include/linux/unix_diag.h
index 3f7afb007d70..a5ce0f325745 100644
--- a/include/linux/unix_diag.h
+++ b/include/linux/unix_diag.h
@@ -1,6 +1,8 @@
 #ifndef __UNIX_DIAG_H__
 #define __UNIX_DIAG_H__
 
+#include <linux/types.h>
+
 struct unix_diag_req {
 	__u8	sdiag_family;
 	__u8	sdiag_protocol;