diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 0cb3f78dd2106..99c2a93c1b1ed 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -414,6 +414,7 @@ extern {
     pub fn rmdir(path: *const c_char) -> ::c_int;
     pub fn setgid(gid: gid_t) -> ::c_int;
     pub fn setpgid(pid: pid_t, pgid: pid_t) -> ::c_int;
+    pub fn setpgrp() -> pid_t;
     pub fn setsid() -> pid_t;
     pub fn setuid(uid: uid_t) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),