diff --git a/src/librustc/middle/infer/region_inference/graphviz.rs b/src/librustc/middle/infer/region_inference/graphviz.rs
index 7be3ec158625c..720de357a273d 100644
--- a/src/librustc/middle/infer/region_inference/graphviz.rs
+++ b/src/librustc/middle/infer/region_inference/graphviz.rs
@@ -20,8 +20,8 @@ use graphviz as dot;
 
 use middle::ty;
 use super::Constraint;
-use middle::typeck::infer::SubregionOrigin;
-use middle::typeck::infer::region_inference::RegionVarBindings;
+use middle::infer::SubregionOrigin;
+use middle::infer::region_inference::RegionVarBindings;
 use session::config;
 use util::nodemap::{FnvHashMap, FnvHashSet};
 use util::ppaux::Repr;
diff --git a/src/librustc/middle/infer/region_inference/mod.rs b/src/librustc/middle/infer/region_inference/mod.rs
index acd49f3f8dfa8..a284dddc323d9 100644
--- a/src/librustc/middle/infer/region_inference/mod.rs
+++ b/src/librustc/middle/infer/region_inference/mod.rs
@@ -40,7 +40,7 @@ mod doc;
 mod graphviz;
 
 // A constraint that influences the inference process.
-#[deriving(PartialEq, Eq, Hash, Show)]
+#[deriving(Clone, PartialEq, Eq, Hash, Show)]
 pub enum Constraint {
     // One region variable is subregion of another
     ConstrainVarSubVar(RegionVid, RegionVid),