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-rw-r--r--src/libstd/io/util.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstd/io/util.rs b/src/libstd/io/util.rs
index 6e651464c74..38e4b0d03e7 100644
--- a/src/libstd/io/util.rs
+++ b/src/libstd/io/util.rs
@@ -10,6 +10,7 @@
 
 #![allow(missing_copy_implementations)]
 
+#[cfg(stage0)]
 use prelude::v1::*;
 
 use io::{self, Read, Write, ErrorKind, BufRead};