diff --git a/libc-test/build.rs b/libc-test/build.rs
index ccb902d9..a693b0d9 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -13,6 +13,7 @@ fn main() {
     let apple = target.contains("apple");
     let musl = target.contains("musl");
     let freebsd = target.contains("freebsd");
+    let mips = target.contains("mips");
     let bsdlike = freebsd || apple;
     let mut cfg = ctest::TestGenerator::new();
 
@@ -112,10 +113,12 @@ fn main() {
         if !musl {
             cfg.header("linux/netlink.h");
         }
+        cfg.header("sched.h");
     }
 
     if freebsd {
         cfg.header("pthread_np.h");
+        cfg.header("sched.h");
     }
 
     cfg.type_name(move |ty, is_struct| {
@@ -222,6 +225,8 @@ fn main() {
             "RLIMIT_NLIMITS" |
             "TCP_COOKIE_TRANSACTIONS" |
             "RLIMIT_RTTIME" if musl => true,
+            // work around super old mips toolchain
+            "SCHED_IDLE" => mips,
 
             _ => false,
         }
diff --git a/src/unix/bsd/freebsdlike/mod.rs b/src/unix/bsd/freebsdlike/mod.rs
index 153e2b54..dab2d036 100644
--- a/src/unix/bsd/freebsdlike/mod.rs
+++ b/src/unix/bsd/freebsdlike/mod.rs
@@ -518,6 +518,10 @@ pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = 0 as *mut _;
 pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = 0 as *mut _;
 pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 2;
 
+pub const SCHED_FIFO: ::c_int = 1;
+pub const SCHED_OTHER: ::c_int = 2;
+pub const SCHED_RR: ::c_int = 3;
+
 extern {
     pub fn mprotect(addr: *const ::c_void, len: ::size_t, prot: ::c_int)
                     -> ::c_int;
diff --git a/src/unix/notbsd/linux/mod.rs b/src/unix/notbsd/linux/mod.rs
index 6619c158..ac6d8cca 100644
--- a/src/unix/notbsd/linux/mod.rs
+++ b/src/unix/notbsd/linux/mod.rs
@@ -281,6 +281,12 @@ pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = pthread_rwlock_t {
 pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 1;
 pub const __SIZEOF_PTHREAD_COND_T: usize = 48;
 
+pub const SCHED_OTHER: ::c_int = 0;
+pub const SCHED_FIFO: ::c_int = 1;
+pub const SCHED_RR: ::c_int = 2;
+pub const SCHED_BATCH: ::c_int = 3;
+pub const SCHED_IDLE: ::c_int = 5;
+
 extern {
     pub fn shm_open(name: *const c_char, oflag: ::c_int,
                     mode: mode_t) -> ::c_int;