diff --git a/src/unix/notbsd/linux/mod.rs b/src/unix/notbsd/linux/mod.rs
index 3787f4bc71532039e21d5cd3c38868854dea6609..45186a055fc693ecb2fdf13a85ded5c0f2685d32 100644
--- a/src/unix/notbsd/linux/mod.rs
+++ b/src/unix/notbsd/linux/mod.rs
@@ -510,6 +510,7 @@ extern {
     pub fn dup3(oldfd: ::c_int, newfd: ::c_int, flags: ::c_int) -> ::c_int;
     pub fn unshare(flags: ::c_int) -> ::c_int;
     pub fn sethostname(name: *const ::c_char, len: ::size_t) -> ::c_int;
+    pub fn setns(fd: ::c_int, nstype: ::c_int) -> ::c_int;
 }
 
 cfg_if! {