diff --git a/src/sys/mod.rs b/src/sys/mod.rs
index 2a968b265..04e0b2000 100644
--- a/src/sys/mod.rs
+++ b/src/sys/mod.rs
@@ -54,6 +54,7 @@ cfg_os_poll! {
 #[cfg(unix)]
 cfg_os_poll! {
     mod unix;
+    #[allow(unused_imports)]
     pub use self::unix::*;
 }
 
@@ -76,6 +77,7 @@ cfg_not_os_poll! {
     #[cfg(unix)]
     cfg_any_os_ext! {
         mod unix;
+        #[cfg(feature = "os-ext")]
         pub use self::unix::SourceFd;
     }
 
diff --git a/src/sys/unix/mod.rs b/src/sys/unix/mod.rs
index fe349846c..bd2fe7d76 100644
--- a/src/sys/unix/mod.rs
+++ b/src/sys/unix/mod.rs
@@ -18,6 +18,7 @@ cfg_os_poll! {
     pub(crate) use self::selector::{event, Event, Events, Selector};
 
     mod sourcefd;
+    #[cfg(feature = "os-ext")]
     pub use self::sourcefd::SourceFd;
 
     mod waker;
@@ -119,6 +120,7 @@ cfg_not_os_poll! {
 
     cfg_any_os_ext! {
         mod sourcefd;
+        #[cfg(feature = "os-ext")]
         pub use self::sourcefd::SourceFd;
     }
 }