diff --git a/mozilla/layout/generic/nsHTMLReflowCommand.cpp b/mozilla/layout/generic/nsHTMLReflowCommand.cpp
index ac3c0c2d590..427cf8991fd 100644
--- a/mozilla/layout/generic/nsHTMLReflowCommand.cpp
+++ b/mozilla/layout/generic/nsHTMLReflowCommand.cpp
@@ -16,6 +16,7 @@
  * Reserved.
  */
 #include "nsHTMLReflowCommand.h"
+#include "nsHTMLParts.h"
 #include "nsIFrame.h"
 #include "nsIHTMLReflow.h"
 #include "nsIPresContext.h"
diff --git a/mozilla/layout/html/base/src/nsHTMLReflowCommand.cpp b/mozilla/layout/html/base/src/nsHTMLReflowCommand.cpp
index ac3c0c2d590..427cf8991fd 100644
--- a/mozilla/layout/html/base/src/nsHTMLReflowCommand.cpp
+++ b/mozilla/layout/html/base/src/nsHTMLReflowCommand.cpp
@@ -16,6 +16,7 @@
  * Reserved.
  */
 #include "nsHTMLReflowCommand.h"
+#include "nsHTMLParts.h"
 #include "nsIFrame.h"
 #include "nsIHTMLReflow.h"
 #include "nsIPresContext.h"