diff --git a/src/header/pthread/mod.rs b/src/header/pthread/mod.rs
index 08e77dfa4d7dc39849d70bac8706ac0bb665b675..7e7ae5c1c829668f47a03821cb5cc71520f90468 100644
--- a/src/header/pthread/mod.rs
+++ b/src/header/pthread/mod.rs
@@ -28,6 +28,8 @@ pub(crate) struct RlctAttr {
     _pad: [u8; 12],
 }
 
+pub const _POSIX_THREADS: c_int = 1;
+
 pub const PTHREAD_BARRIER_SERIAL_THREAD: c_int = -1;
 
 pub const PTHREAD_CANCEL_ASYNCHRONOUS: c_int = 0;