diff --git a/alacritty/src/window.rs b/alacritty/src/window.rs
index 1d4ef61..7fa11c1 100644
--- a/alacritty/src/window.rs
+++ b/alacritty/src/window.rs
@@ -15,6 +15,7 @@ use std::convert::From;
 #[cfg(not(any(target_os = "macos", windows)))]
 use std::ffi::c_void;
 use std::fmt;
+#[cfg(not(any(target_os = "macos", windows)))]
 use std::os::raw::c_ulong;
 
 use glutin::dpi::{LogicalPosition, LogicalSize, PhysicalPosition, PhysicalSize};