diff --git a/libc-test/semver/linux.txt b/libc-test/semver/linux.txt
index d8fa593c67795..14d3fe74b7cb1 100644
--- a/libc-test/semver/linux.txt
+++ b/libc-test/semver/linux.txt
@@ -1696,6 +1696,7 @@ POSIX_SPAWN_SETSCHEDULER
 POSIX_SPAWN_SETSIGDEF
 POSIX_SPAWN_SETSIGMASK
 POSIX_SPAWN_USEVFORK
+POSIX_SPAWN_SETSID
 PROT_GROWSDOWN
 PROT_GROWSUP
 PR_CAPBSET_DROP
diff --git a/src/unix/linux_like/linux/mod.rs b/src/unix/linux_like/linux/mod.rs
index 15174bc306419..273e70fb93af5 100644
--- a/src/unix/linux_like/linux/mod.rs
+++ b/src/unix/linux_like/linux/mod.rs
@@ -1593,6 +1593,7 @@ pub const POSIX_MADV_RANDOM: ::c_int = 1;
 pub const POSIX_MADV_SEQUENTIAL: ::c_int = 2;
 pub const POSIX_MADV_WILLNEED: ::c_int = 3;
 pub const POSIX_SPAWN_USEVFORK: ::c_int = 64;
+pub const POSIX_SPAWN_SETSID: ::c_int = 128;
 
 pub const S_IEXEC: mode_t = 64;
 pub const S_IWRITE: mode_t = 128;