diff --git a/src/unix/bsd/openbsdlike/mod.rs b/src/unix/bsd/openbsdlike/mod.rs
index 4c5fd4aec50d9..8bb15cffc08f1 100644
--- a/src/unix/bsd/openbsdlike/mod.rs
+++ b/src/unix/bsd/openbsdlike/mod.rs
@@ -441,6 +441,8 @@ pub const RTLD_GLOBAL: ::c_int = 0x100;
 
 pub const LOG_NFACILITIES: ::c_int = 24;
 
+pub const HW_NCPU: ::c_int = 3;
+
 #[link(name = "util")]
 extern {
     pub fn mincore(addr: *mut ::c_void, len: ::size_t,