diff --git a/sdk/lib/io/directory_impl.dart b/sdk/lib/io/directory_impl.dart
index 17d67bee76c..e27b6103f64 100644
--- a/sdk/lib/io/directory_impl.dart
+++ b/sdk/lib/io/directory_impl.dart
@@ -98,7 +98,7 @@ class _Directory implements Directory {
   }
 
   Future<Directory> createRecursively() {
-    var path = new Path(path);
+    var path = new Path(this.path);
     var dirsToCreate = [];
     var terminator = path.isAbsolute ? '/' : '';
     while (path.toString() != terminator) {
@@ -139,7 +139,7 @@ class _Directory implements Directory {
   }
 
   void createRecursivelySync() {
-    var path = new Path(path);
+    var path = new Path(this.path);
     var dirsToCreate = [];
     var terminator = path.isAbsolute ? '/' : '';
     while (path.toString() != terminator) {
diff --git a/sdk/lib/io/file_impl.dart b/sdk/lib/io/file_impl.dart
index b6a47c7969d..cf9a7ef3617 100644
--- a/sdk/lib/io/file_impl.dart
+++ b/sdk/lib/io/file_impl.dart
@@ -346,7 +346,7 @@ class _File implements File {
   }
 
   Directory get directory {
-    Path path = new Path(path).directoryPath;
+    Path path = new Path(this.path).directoryPath;
     return new Directory.fromPath(path);
   }
 
diff --git a/sdk/lib/io/http.dart b/sdk/lib/io/http.dart
index 4b490c215e3..90b36a12647 100644
--- a/sdk/lib/io/http.dart
+++ b/sdk/lib/io/http.dart
@@ -1489,4 +1489,6 @@ class RedirectException implements HttpException {
                           List<RedirectInfo> this.redirects);
 
   String toString() => "RedirectException: $message";
+
+  Uri get uri => redirects.last.location;
 }
diff --git a/sdk/lib/io/websocket_impl.dart b/sdk/lib/io/websocket_impl.dart
index 140bd3bd3b3..aec29197075 100644
--- a/sdk/lib/io/websocket_impl.dart
+++ b/sdk/lib/io/websocket_impl.dart
@@ -826,7 +826,7 @@ class _WebSocketImpl extends Stream implements WebSocket {
                                      cancelOnError: cancelOnError);
   }
 
-  Duration get pingnterval => _pingInterval;
+  Duration get pingInterval => _pingInterval;
 
   void set pingInterval(Duration interval) {
     if (_writeClosed) return;