diff --git a/src/popen.rs b/src/popen.rs
index 2f6fed0..c65fe97 100644
--- a/src/popen.rs
+++ b/src/popen.rs
@@ -607,7 +607,6 @@ mod os {
     use std::ffi::OsString;
     use std::time::{Duration, Instant};
 
-    use super::ChildState::*;
     use super::fileref::FileRef;
     use unix::PopenExt;