--- a/layout/style/nsComputedDOMStyle.cpp
+++ b/layout/style/nsComputedDOMStyle.cpp
@@ -33,16 +33,17 @@
 #include "nsROCSSPrimitiveValue.h"
 
 #include "nsPresContext.h"
 #include "nsIDocument.h"
 
 #include "nsCSSPseudoElements.h"
 #include "mozilla/StyleSetHandle.h"
 #include "mozilla/StyleSetHandleInlines.h"
+#include "mozilla/RestyleManager.h"
 #include "imgIRequest.h"
 #include "nsLayoutUtils.h"
 #include "nsCSSKeywords.h"
 #include "nsStyleCoord.h"
 #include "nsDisplayList.h"
 #include "nsDOMCSSDeclaration.h"
 #include "nsStyleTransformMatrix.h"
 #include "mozilla/dom/Element.h"