diff --git a/libc/kernel/uapi/linux/mptcp.h b/libc/kernel/uapi/linux/mptcp.h
new file mode 100644
index 0000000..43702f3
--- /dev/null
+++ b/libc/kernel/uapi/linux/mptcp.h
@@ -0,0 +1,84 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _UAPI_MPTCP_H
+#define _UAPI_MPTCP_H
+#include <linux/const.h>
+#include <linux/types.h>
+#define MPTCP_SUBFLOW_FLAG_MCAP_REM _BITUL(0)
+#define MPTCP_SUBFLOW_FLAG_MCAP_LOC _BITUL(1)
+#define MPTCP_SUBFLOW_FLAG_JOIN_REM _BITUL(2)
+#define MPTCP_SUBFLOW_FLAG_JOIN_LOC _BITUL(3)
+#define MPTCP_SUBFLOW_FLAG_BKUP_REM _BITUL(4)
+#define MPTCP_SUBFLOW_FLAG_BKUP_LOC _BITUL(5)
+#define MPTCP_SUBFLOW_FLAG_FULLY_ESTABLISHED _BITUL(6)
+#define MPTCP_SUBFLOW_FLAG_CONNECTED _BITUL(7)
+#define MPTCP_SUBFLOW_FLAG_MAPVALID _BITUL(8)
+enum {
+  MPTCP_SUBFLOW_ATTR_UNSPEC,
+  MPTCP_SUBFLOW_ATTR_TOKEN_REM,
+  MPTCP_SUBFLOW_ATTR_TOKEN_LOC,
+  MPTCP_SUBFLOW_ATTR_RELWRITE_SEQ,
+  MPTCP_SUBFLOW_ATTR_MAP_SEQ,
+  MPTCP_SUBFLOW_ATTR_MAP_SFSEQ,
+  MPTCP_SUBFLOW_ATTR_SSN_OFFSET,
+  MPTCP_SUBFLOW_ATTR_MAP_DATALEN,
+  MPTCP_SUBFLOW_ATTR_FLAGS,
+  MPTCP_SUBFLOW_ATTR_ID_REM,
+  MPTCP_SUBFLOW_ATTR_ID_LOC,
+  MPTCP_SUBFLOW_ATTR_PAD,
+  __MPTCP_SUBFLOW_ATTR_MAX
+};
+#define MPTCP_SUBFLOW_ATTR_MAX (__MPTCP_SUBFLOW_ATTR_MAX - 1)
+#define MPTCP_PM_NAME "mptcp_pm"
+#define MPTCP_PM_CMD_GRP_NAME "mptcp_pm_cmds"
+#define MPTCP_PM_VER 0x1
+enum {
+  MPTCP_PM_ATTR_UNSPEC,
+  MPTCP_PM_ATTR_ADDR,
+  MPTCP_PM_ATTR_RCV_ADD_ADDRS,
+  MPTCP_PM_ATTR_SUBFLOWS,
+  __MPTCP_PM_ATTR_MAX
+};
+#define MPTCP_PM_ATTR_MAX (__MPTCP_PM_ATTR_MAX - 1)
+enum {
+  MPTCP_PM_ADDR_ATTR_UNSPEC,
+  MPTCP_PM_ADDR_ATTR_FAMILY,
+  MPTCP_PM_ADDR_ATTR_ID,
+  MPTCP_PM_ADDR_ATTR_ADDR4,
+  MPTCP_PM_ADDR_ATTR_ADDR6,
+  MPTCP_PM_ADDR_ATTR_PORT,
+  MPTCP_PM_ADDR_ATTR_FLAGS,
+  MPTCP_PM_ADDR_ATTR_IF_IDX,
+  __MPTCP_PM_ADDR_ATTR_MAX
+};
+#define MPTCP_PM_ADDR_ATTR_MAX (__MPTCP_PM_ADDR_ATTR_MAX - 1)
+#define MPTCP_PM_ADDR_FLAG_SIGNAL (1 << 0)
+#define MPTCP_PM_ADDR_FLAG_SUBFLOW (1 << 1)
+#define MPTCP_PM_ADDR_FLAG_BACKUP (1 << 2)
+enum {
+  MPTCP_PM_CMD_UNSPEC,
+  MPTCP_PM_CMD_ADD_ADDR,
+  MPTCP_PM_CMD_DEL_ADDR,
+  MPTCP_PM_CMD_GET_ADDR,
+  MPTCP_PM_CMD_FLUSH_ADDRS,
+  MPTCP_PM_CMD_SET_LIMITS,
+  MPTCP_PM_CMD_GET_LIMITS,
+  __MPTCP_PM_CMD_AFTER_LAST
+};
+#endif