diff --git a/src/unix.rs b/src/unix.rs
index e0b988c..983693b 100644
--- a/src/unix.rs
+++ b/src/unix.rs
@@ -75,7 +75,6 @@ extern "C" {
         any(
             target_os = "openbsd",
             target_os = "netbsd",
-            target_os = "bitrig",
             target_os = "android",
             target_os = "espidf",
             target_env = "newlib"