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-rw-r--r--src/libstd/unstable/stack.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libstd/unstable/stack.rs b/src/libstd/unstable/stack.rs
index d6cd690eaa9..5b5eaf9d8d0 100644
--- a/src/libstd/unstable/stack.rs
+++ b/src/libstd/unstable/stack.rs
@@ -24,6 +24,8 @@
 //! detection is not guaranteed to continue in the future. Usage of this module
 //! is discouraged unless absolutely necessary.
 
+use str::Str;
+
 static RED_ZONE: uint = 20 * 1024;
 
 /// This function is invoked from rust's current __morestack function. Segmented