diff --git a/layout/style/nsComputedDOMStyle.cpp b/layout/style/nsComputedDOMStyle.cpp
index 1950e413aa8d..19c4d7415e04 100644
--- a/layout/style/nsComputedDOMStyle.cpp
+++ b/layout/style/nsComputedDOMStyle.cpp
@@ -38,6 +38,7 @@
 #include "nsCSSPseudoElements.h"
 #include "mozilla/StyleSetHandle.h"
 #include "mozilla/StyleSetHandleInlines.h"
+#include "mozilla/RestyleManager.h"
 #include "imgIRequest.h"
 #include "nsLayoutUtils.h"
 #include "nsCSSKeywords.h"