diff --git a/src/libcore/future.rs b/src/libcore/future.rs
index 99fc9ce4d37..b1d73dd9f5a 100644
--- a/src/libcore/future.rs
+++ b/src/libcore/future.rs
@@ -33,7 +33,7 @@ export future_pipe;
 
 #[doc = "The future type"]
 struct Future<A> {
-    /*priv*/ mut state: FutureState<A>;
+    /*priv*/ mut state: FutureState<A>,
 
     // FIXME(#2829) -- futures should not be copyable, because they close
     // over fn~'s that have pipes and so forth within!