diff --git a/src/unix/linux_like/emscripten/mod.rs b/src/unix/linux_like/emscripten/mod.rs
index 3fc47bb5ebab3..ab94d53eaaff0 100644
--- a/src/unix/linux_like/emscripten/mod.rs
+++ b/src/unix/linux_like/emscripten/mod.rs
@@ -1227,6 +1227,7 @@ pub const TCP_QUEUE_SEQ: ::c_int = 21;
 pub const TCP_REPAIR_OPTIONS: ::c_int = 22;
 pub const TCP_FASTOPEN: ::c_int = 23;
 pub const TCP_TIMESTAMP: ::c_int = 24;
+pub const TCP_FASTOPEN_CONNECT: ::c_int = 30;
 
 #[doc(hidden)]
 #[deprecated(since = "0.2.55", note = "Use SIGSYS instead")]
diff --git a/src/unix/linux_like/linux/gnu/mod.rs b/src/unix/linux_like/linux/gnu/mod.rs
index 00ee8f02f8346..e19144295f250 100644
--- a/src/unix/linux_like/linux/gnu/mod.rs
+++ b/src/unix/linux_like/linux/gnu/mod.rs
@@ -410,6 +410,7 @@ pub const TCP_QUEUE_SEQ: ::c_int = 21;
 pub const TCP_REPAIR_OPTIONS: ::c_int = 22;
 pub const TCP_FASTOPEN: ::c_int = 23;
 pub const TCP_TIMESTAMP: ::c_int = 24;
+pub const TCP_FASTOPEN_CONNECT: ::c_int = 30;
 
 /* DCCP socket options */
 pub const DCCP_SOCKOPT_PACKET_SIZE: ::c_int = 1;
diff --git a/src/unix/linux_like/linux/musl/mod.rs b/src/unix/linux_like/linux/musl/mod.rs
index 0bddd64abae18..01b2c8ab512a5 100644
--- a/src/unix/linux_like/linux/musl/mod.rs
+++ b/src/unix/linux_like/linux/musl/mod.rs
@@ -271,6 +271,7 @@ pub const TCP_QUEUE_SEQ: ::c_int = 21;
 pub const TCP_REPAIR_OPTIONS: ::c_int = 22;
 pub const TCP_FASTOPEN: ::c_int = 23;
 pub const TCP_TIMESTAMP: ::c_int = 24;
+pub const TCP_FASTOPEN_CONNECT: ::c_int = 30;
 
 #[deprecated(since = "0.2.55", note = "Use SIGSYS instead")]
 pub const SIGUNUSED: ::c_int = ::SIGSYS;