diff --git a/src/basic/missing_namespace.h b/src/basic/missing_namespace.h
index 1c7285151e..b659a8edc3 100644
--- a/src/basic/missing_namespace.h
+++ b/src/basic/missing_namespace.h
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
+#include <linux/nsfs.h>
 #include <linux/types.h>
 
 /* Root namespace inode numbers, as per include/linux/proc_ns.h in the kernel source tree, since v3.8:
@@ -12,16 +13,3 @@
 #define PROC_PID_INIT_INO    ((ino_t) UINT32_C(0xEFFFFFFC))
 #define PROC_CGROUP_INIT_INO ((ino_t) UINT32_C(0xEFFFFFFB))
 #define PROC_TIME_INIT_INO   ((ino_t) UINT32_C(0xEFFFFFFA))
-
-/* linux/nsfs.h */
-#ifndef NS_GET_USERNS /* 6786741dbf99e44fb0c0ed85a37582b8a26f1c3b (4.9) */
-#define NS_GET_USERNS _IO(0xb7, 0x1)
-#endif
-
-#ifndef NS_GET_NSTYPE /* e5ff5ce6e20ee22511398bb31fb912466cf82a36 (4.11) */
-#define NS_GET_NSTYPE _IO(0xb7, 0x3)
-#endif
-
-#ifndef NS_GET_OWNER_UID /* d95fa3c76a66b6d76b1e109ea505c55e66360f3c (4.11) */
-#define NS_GET_OWNER_UID _IO(0xb7, 0x4)
-#endif