diff --git a/content/shared/public/nsXULAtomList.h b/content/shared/public/nsXULAtomList.h
index c5668a8945d2..49167b112bd8 100644
--- a/content/shared/public/nsXULAtomList.h
+++ b/content/shared/public/nsXULAtomList.h
@@ -59,6 +59,7 @@
 XUL_ATOM(button, "button")
 XUL_ATOM(spinner, "spinner")
 XUL_ATOM(scrollbar, "scrollbar")
+XUL_ATOM(nativescrollbar, "nativescrollbar")
 XUL_ATOM(slider, "slider")
 XUL_ATOM(palettename, "palettename")
 XUL_ATOM(fontpicker, "fontpicker")
diff --git a/widget/public/nsWidgetAtomList.h b/widget/public/nsWidgetAtomList.h
index 2fb9807f8925..d64a7703af0e 100644
--- a/widget/public/nsWidgetAtomList.h
+++ b/widget/public/nsWidgetAtomList.h
@@ -73,3 +73,7 @@ WIDGET_ATOM(disabled, "disabled")
 WIDGET_ATOM(label, "label")
 WIDGET_ATOM(hidden, "hidden")
 
+WIDGET_ATOM(curpos, "curpos")
+WIDGET_ATOM(maxpos, "maxpos")
+WIDGET_ATOM(increment, "increment")
+WIDGET_ATOM(pageincrement, "pageincrement")