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-rw-r--r--src/libstd/bitv.rs4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/libstd/bitv.rs b/src/libstd/bitv.rs
index 9cf2d145eac..430a5eab64e 100644
--- a/src/libstd/bitv.rs
+++ b/src/libstd/bitv.rs
@@ -700,8 +700,8 @@ impl cmp::Eq for BitvSet {
 }
 
 impl Container for BitvSet {
-    pure fn len(&self) -> uint { self.size }
-    pure fn is_empty(&self) -> bool { self.size == 0 }
+    pure fn len(&const self) -> uint { self.size }
+    pure fn is_empty(&const self) -> bool { self.size == 0 }
 }
 
 impl Mutable for BitvSet {