diff --git a/src/libstd/rt/io/mod.rs b/src/libstd/rt/io/mod.rs
index a18f97930fa2f..f14f8f28d123b 100644
--- a/src/libstd/rt/io/mod.rs
+++ b/src/libstd/rt/io/mod.rs
@@ -297,7 +297,7 @@ pub mod flate;
 pub mod comm_adapters;
 
 /// Extension traits
-mod extensions;
+pub mod extensions;
 
 /// Non-I/O things needed by the I/O module
 // XXX: shouldn this really be pub?