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-rw-r--r--src/libsyntax/ext/env.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libsyntax/ext/env.rs b/src/libsyntax/ext/env.rs
index 3e5fb939f62..4d074b4d0e6 100644
--- a/src/libsyntax/ext/env.rs
+++ b/src/libsyntax/ext/env.rs
@@ -22,6 +22,8 @@ use ext::base::*;
 use ext::base;
 use ext::build::AstBuilder;
 
+use core::os;
+
 pub fn expand_syntax_ext(cx: @ExtCtxt, sp: span, tts: &[ast::token_tree])
     -> base::MacResult {