diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index 84931b8d..e15d8d67 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -697,6 +697,8 @@ pub const FD_SETSIZE: usize = 1024;
 
 pub const ST_NOSUID: ::c_ulong = 2;
 
+pub const HW_AVAILCPU: ::c_int = 25;
+
 extern {
     pub fn mincore(addr: *const ::c_void, len: ::size_t,
                    vec: *mut ::c_char) -> ::c_int;
diff --git a/src/unix/bsd/freebsdlike/mod.rs b/src/unix/bsd/freebsdlike/mod.rs
index 6a0ef492..ebcdee7c 100644
--- a/src/unix/bsd/freebsdlike/mod.rs
+++ b/src/unix/bsd/freebsdlike/mod.rs
@@ -543,6 +543,8 @@ pub const FD_SETSIZE: usize = 1024;
 
 pub const ST_NOSUID: ::c_ulong = 2;
 
+pub const HW_AVAILCPU: ::c_int = 25;
+
 extern {
     pub fn mincore(addr: *const ::c_void, len: ::size_t,
                    vec: *mut c_char) -> ::c_int;
diff --git a/src/unix/bsd/mod.rs b/src/unix/bsd/mod.rs
index 0cb2515e..80746a88 100644
--- a/src/unix/bsd/mod.rs
+++ b/src/unix/bsd/mod.rs
@@ -98,6 +98,9 @@ pub const ST_RDONLY: ::c_ulong = 1;
 
 pub const NI_MAXHOST: ::socklen_t = 1025;
 
+pub const CTL_HW: ::c_int = 6;
+pub const HW_NCPU: ::c_int = 3;
+
 f! {
     pub fn FD_CLR(fd: ::c_int, set: *mut fd_set) -> () {
         let fd = fd as usize;
diff --git a/src/unix/bsd/openbsdlike/bitrig.rs b/src/unix/bsd/openbsdlike/bitrig.rs
index 2956c025..e25f3ff8 100644
--- a/src/unix/bsd/openbsdlike/bitrig.rs
+++ b/src/unix/bsd/openbsdlike/bitrig.rs
@@ -205,6 +205,8 @@ 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 HW_AVAILCPU: ::c_int = 25;
+
 extern {
     pub fn mprotect(addr: *const ::c_void, len: ::size_t, prot: ::c_int)
                     -> ::c_int;
diff --git a/src/unix/bsd/openbsdlike/openbsd.rs b/src/unix/bsd/openbsdlike/openbsd.rs
index acc9602b..39dbb651 100644
--- a/src/unix/bsd/openbsdlike/openbsd.rs
+++ b/src/unix/bsd/openbsdlike/openbsd.rs
@@ -208,6 +208,8 @@ 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 HW_AVAILCPU: ::c_int = 25;
+
 extern {
     pub fn mprotect(addr: *const ::c_void, len: ::size_t, prot: ::c_int)
                     -> ::c_int;
diff --git a/src/unix/notbsd/android/mod.rs b/src/unix/notbsd/android/mod.rs
index 2c01b251..e7f80bff 100644
--- a/src/unix/notbsd/android/mod.rs
+++ b/src/unix/notbsd/android/mod.rs
@@ -163,6 +163,7 @@ pub const _SC_THREAD_PRIORITY_SCHEDULING: ::c_int = 82;
 pub const _SC_THREAD_PRIO_INHERIT: ::c_int = 83;
 pub const _SC_THREAD_PRIO_PROTECT: ::c_int = 84;
 pub const _SC_THREAD_SAFE_FUNCTIONS: ::c_int = 85;
+pub const _SC_NPROCESSORS_ONLN: ::c_int = 97;
 
 pub const PTHREAD_STACK_MIN: ::size_t = 8192;
 pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = pthread_mutex_t {