diff --git a/build.rs b/build.rs
index e4b696e9..02656064 100644
--- a/build.rs
+++ b/build.rs
@@ -1,4 +1,4 @@
-#![feature(io, path, fs)]
+#![feature(io, path)]
 extern crate phf_codegen;
 
 use std::env;