diff --git a/src/env.rs b/src/env.rs
index 487c6237b1..0d815be91e 100644
--- a/src/env.rs
+++ b/src/env.rs
@@ -1,4 +1,3 @@
-use std::env;
 use {Error, Result};
 
 /// Clear the environment of all name-value pairs.
@@ -37,7 +36,10 @@ pub unsafe fn clearenv() -> Result<()> {
                      target_os = "emscripten"))] {
             ret = libc::clearenv();
         } else {
-            manual_clearenv();
+            use std::env;
+            for (name, _) in env::vars_os() {
+                env::remove_var(name);
+            }
             ret = 0;
         }
     }
@@ -48,9 +50,3 @@ pub unsafe fn clearenv() -> Result<()> {
         Err(Error::UnsupportedOperation)
     }
 }
-
-fn manual_clearenv() {
-    for (name, _) in env::vars_os() {
-        env::remove_var(name);
-    }
-}