diff --git a/src/os/windows/mod.rs b/src/os/windows/mod.rs
index 6dac11b6e..67bf0372a 100644
--- a/src/os/windows/mod.rs
+++ b/src/os/windows/mod.rs
@@ -5,5 +5,6 @@ cfg_std! {
 }
 
 cfg_unstable! {
+    #[cfg(feature = "default")]
     pub mod fs;
 }