diff --git a/WebCore/DerivedSources.cpp b/WebCore/DerivedSources.cpp
index 38f9e10..eaf8b7e 100644
--- a/WebCore/DerivedSources.cpp
+++ b/WebCore/DerivedSources.cpp
@@ -69,6 +69,7 @@
 #include "JSDataGridColumn.cpp"
 #include "JSDataGridColumnList.cpp"
 #include "JSDedicatedWorkerContext.cpp"
+#include "JSDeviceOrientationEvent.cpp"
 #include "JSDocument.cpp"
 #include "JSDocumentFragment.cpp"
 #include "JSDocumentType.cpp"