diff --git a/layout/xul/base/public/nsIBrowserBoxObject.idl b/layout/xul/base/public/nsIBrowserBoxObject.idl
index addbe618cd0c..0a9358b1cd4a 100644
--- a/layout/xul/base/public/nsIBrowserBoxObject.idl
+++ b/layout/xul/base/public/nsIBrowserBoxObject.idl
@@ -23,8 +23,8 @@
  */
 
 #include "nsIBoxObject.idl"
-#include "nsIWebBrowser.idl"
-#include "domstubs.idl"
+
+interface nsIWebBrowser;
 
 [scriptable, uuid(F2504C26-7CF5-426a-86A7-E50998AC57C1)]
 interface nsIBrowserBoxObject : nsISupports
diff --git a/layout/xul/base/public/nsIEditorBoxObject.idl b/layout/xul/base/public/nsIEditorBoxObject.idl
index ef7b56d560a3..141feb5ddd76 100644
--- a/layout/xul/base/public/nsIEditorBoxObject.idl
+++ b/layout/xul/base/public/nsIEditorBoxObject.idl
@@ -23,8 +23,8 @@
  */
 
 #include "nsIBoxObject.idl"
-#include "nsIEditorShell.idl"
-#include "domstubs.idl"
+
+interface nsIEditorShell;
 
 [scriptable, uuid(14B3B669-3414-4548-AA03-EDF257D889C8)]
 interface nsIEditorBoxObject : nsISupports
diff --git a/layout/xul/base/public/nsIIFrameBoxObject.idl b/layout/xul/base/public/nsIIFrameBoxObject.idl
index bd65992bf4a1..a20a3cf87bfd 100644
--- a/layout/xul/base/public/nsIIFrameBoxObject.idl
+++ b/layout/xul/base/public/nsIIFrameBoxObject.idl
@@ -23,8 +23,8 @@
  */
 
 #include "nsIBoxObject.idl"
-#include "nsIDocShell.idl"
-#include "domstubs.idl"
+
+interface nsIDocShell;
 
 [scriptable, uuid(DD9AB9BE-FED3-4bff-A72D-5390D52DD887)]
 interface nsIIFrameBoxObject : nsISupports