diff --git a/libc/kernel/uapi/linux/seccomp.h b/libc/kernel/uapi/linux/seccomp.h
index fe63789..a1e577d 100644
--- a/libc/kernel/uapi/linux/seccomp.h
+++ b/libc/kernel/uapi/linux/seccomp.h
@@ -26,14 +26,17 @@
 #define SECCOMP_SET_MODE_STRICT 0
 #define SECCOMP_SET_MODE_FILTER 1
 #define SECCOMP_GET_ACTION_AVAIL 2
+#define SECCOMP_GET_NOTIF_SIZES 3
 #define SECCOMP_FILTER_FLAG_TSYNC (1UL << 0)
 #define SECCOMP_FILTER_FLAG_LOG (1UL << 1)
 #define SECCOMP_FILTER_FLAG_SPEC_ALLOW (1UL << 2)
+#define SECCOMP_FILTER_FLAG_NEW_LISTENER (1UL << 3)
 #define SECCOMP_RET_KILL_PROCESS 0x80000000U
 #define SECCOMP_RET_KILL_THREAD 0x00000000U
 #define SECCOMP_RET_KILL SECCOMP_RET_KILL_THREAD
 #define SECCOMP_RET_TRAP 0x00030000U
 #define SECCOMP_RET_ERRNO 0x00050000U
+#define SECCOMP_RET_USER_NOTIF 0x7fc00000U
 #define SECCOMP_RET_TRACE 0x7ff00000U
 #define SECCOMP_RET_LOG 0x7ffc0000U
 #define SECCOMP_RET_ALLOW 0x7fff0000U
@@ -46,4 +49,29 @@
   __u64 instruction_pointer;
   __u64 args[6];
 };
+struct seccomp_notif_sizes {
+  __u16 seccomp_notif;
+  __u16 seccomp_notif_resp;
+  __u16 seccomp_data;
+};
+struct seccomp_notif {
+  __u64 id;
+  __u32 pid;
+  __u32 flags;
+  struct seccomp_data data;
+};
+struct seccomp_notif_resp {
+  __u64 id;
+  __s64 val;
+  __s32 error;
+  __u32 flags;
+};
+#define SECCOMP_IOC_MAGIC '!'
+#define SECCOMP_IO(nr) _IO(SECCOMP_IOC_MAGIC, nr)
+#define SECCOMP_IOR(nr,type) _IOR(SECCOMP_IOC_MAGIC, nr, type)
+#define SECCOMP_IOW(nr,type) _IOW(SECCOMP_IOC_MAGIC, nr, type)
+#define SECCOMP_IOWR(nr,type) _IOWR(SECCOMP_IOC_MAGIC, nr, type)
+#define SECCOMP_IOCTL_NOTIF_RECV SECCOMP_IOWR(0, struct seccomp_notif)
+#define SECCOMP_IOCTL_NOTIF_SEND SECCOMP_IOWR(1, struct seccomp_notif_resp)
+#define SECCOMP_IOCTL_NOTIF_ID_VALID SECCOMP_IOR(2, __u64)
 #endif