diff --git a/src/lib.rs b/src/lib.rs
index 018d903bd9..1d6a5f2768 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1188,6 +1188,6 @@ pub mod protocol {
         }
     }
 
-    pub const O_CLOEXEC: usize = 0x0100_0000;
+    pub const O_CLOEXEC: usize = syscall::flag::O_CLOEXEC;
     pub const F_DUPFD_CLOEXEC: usize = 5;
 }