diff --git a/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart b/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart
index 3429925..78dabae 100644
--- a/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart
+++ b/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart
@@ -304,8 +304,7 @@
 @Unstable()
 @Native("IDBDatabase")
 class Database extends EventTarget {
-  ObjectStore createObjectStore(String name,
-      {String keyPath, bool autoIncrement}) {
+  ObjectStore createObjectStore(String name, {keyPath, bool autoIncrement}) {
     var options = {};
     if (keyPath != null) {
       options['keyPath'] = keyPath;
diff --git a/tools/dom/templates/html/impl/impl_IDBDatabase.darttemplate b/tools/dom/templates/html/impl/impl_IDBDatabase.darttemplate
index 76adb99..7a12b6c 100644
--- a/tools/dom/templates/html/impl/impl_IDBDatabase.darttemplate
+++ b/tools/dom/templates/html/impl/impl_IDBDatabase.darttemplate
@@ -6,7 +6,7 @@
 
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
   ObjectStore createObjectStore(String name,
-      {String keyPath, bool autoIncrement}) {
+      {keyPath, bool autoIncrement}) {
     var options = {};
     if (keyPath != null) {
       options['keyPath'] = keyPath;