diff --git a/libc/kernel/uapi/linux/mptcp.h b/libc/kernel/uapi/linux/mptcp.h
index c51f15e..67b0ce3 100644
--- a/libc/kernel/uapi/linux/mptcp.h
+++ b/libc/kernel/uapi/linux/mptcp.h
@@ -20,6 +20,10 @@
 #define _UAPI_MPTCP_H
 #include <linux/const.h>
 #include <linux/types.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/socket.h>
+#include <sys/socket.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)
@@ -142,4 +146,28 @@
 #define MPTCP_RST_EWQ2BIG 4
 #define MPTCP_RST_EBADPERF 5
 #define MPTCP_RST_EMIDDLEBOX 6
+struct mptcp_subflow_data {
+  __u32 size_subflow_data;
+  __u32 num_subflows;
+  __u32 size_kernel;
+  __u32 size_user;
+} __attribute__((aligned(8)));
+struct mptcp_subflow_addrs {
+  union {
+    __kernel_sa_family_t sa_family;
+    struct sockaddr sa_local;
+    struct sockaddr_in sin_local;
+    struct sockaddr_in6 sin6_local;
+    struct __kernel_sockaddr_storage ss_local;
+  };
+  union {
+    struct sockaddr sa_remote;
+    struct sockaddr_in sin_remote;
+    struct sockaddr_in6 sin6_remote;
+    struct __kernel_sockaddr_storage ss_remote;
+  };
+};
+#define MPTCP_INFO 1
+#define MPTCP_TCPINFO 2
+#define MPTCP_SUBFLOW_ADDRS 3
 #endif