diff --git a/src/ext.rs b/src/ext.rs
index ca64bef..b50a9df 100644
--- a/src/ext.rs
+++ b/src/ext.rs
@@ -668,7 +668,7 @@ impl<T: AsRawSocket> AsSock for T {
 cfg_if! {
     if #[cfg(any(target_os = "macos", target_os = "ios"))] {
         use libc::TCP_KEEPALIVE as KEEPALIVE_OPTION;
-    } else if #[cfg(any(target_os = "haiku", target_os = "netbsd", target_os = "openbsd"))] {
+    } else if #[cfg(any(target_os = "haiku",  target_os = "openbsd"))] {
         use libc::SO_KEEPALIVE as KEEPALIVE_OPTION;
     } else if #[cfg(unix)] {
         use libc::TCP_KEEPIDLE as KEEPALIVE_OPTION;