diff --git a/res/values/config.xml b/res/values/config.xml
index 1c996eb..509f363 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -69,6 +69,7 @@
     <string name="test_information_handler_class" translatable="false"></string>
     <string name="launcher_activity_logic_class" translatable="false"></string>
     <string name="model_delegate_class" translatable="false"></string>
+    <string name="window_manager_proxy_class" translatable="false"></string>
 
     <!-- View ID to use for QSB widget -->
     <item type="id" name="qsb_widget" />