diff --git a/src/libsyntax/ext/base.rs b/src/libsyntax/ext/base.rs
index 94bf2a43f28a..5894758cd85c 100644
--- a/src/libsyntax/ext/base.rs
+++ b/src/libsyntax/ext/base.rs
@@ -231,7 +231,7 @@ fn mk_ctxt(parse_sess: parse::parse_sess,
         mut mod_path: ~[],
         mut trace_mac: false
     };
-    move (imp as ext_ctxt)
+    move ((move imp) as ext_ctxt)
 }
 
 fn expr_to_str(cx: ext_ctxt, expr: @ast::expr, error: ~str) -> ~str {
diff --git a/src/libsyntax/util/interner.rs b/src/libsyntax/util/interner.rs
index 021c25e3dd71..5d991bb3551c 100644
--- a/src/libsyntax/util/interner.rs
+++ b/src/libsyntax/util/interner.rs
@@ -16,7 +16,7 @@ fn mk<T:Eq IterBytes Hash Const Copy>() -> interner<T> {
     let m = map::HashMap::<T, uint>();
     let hi: hash_interner<T> =
         {map: m, vect: DVec()};
-    move (hi as interner::<T>)
+    move ((move hi) as interner::<T>)
 }
 
 fn mk_prefill<T:Eq IterBytes Hash Const Copy>(init: ~[T]) -> interner<T> {