diff --git a/clutter/clutter/clutter-paint-volume-private.h b/clutter/clutter/clutter-paint-volume-private.h
index a54218460..accaa4835 100644
--- a/clutter/clutter/clutter-paint-volume-private.h
+++ b/clutter/clutter/clutter-paint-volume-private.h
@@ -126,9 +126,9 @@ void                _clutter_paint_volume_set_reference_actor  (ClutterPaintVolu
 ClutterCullResult   _clutter_paint_volume_cull                 (ClutterPaintVolume       *pv,
                                                                 const graphene_frustum_t *frustum);
 
-void                _clutter_paint_volume_get_stage_paint_box  (ClutterPaintVolume *pv,
-                                                                ClutterStage *stage,
-                                                                ClutterActorBox *box);
+void                _clutter_paint_volume_get_stage_paint_box  (const ClutterPaintVolume *pv,
+                                                                ClutterStage             *stage,
+                                                                ClutterActorBox          *box);
 
 void                _clutter_paint_volume_transform_relative   (ClutterPaintVolume *pv,
                                                                 ClutterActor *relative_to_ancestor);
diff --git a/clutter/clutter/clutter-paint-volume.c b/clutter/clutter/clutter-paint-volume.c
index dbec4d130..e2f273ef3 100644
--- a/clutter/clutter/clutter-paint-volume.c
+++ b/clutter/clutter/clutter-paint-volume.c
@@ -1029,9 +1029,9 @@ _clutter_paint_volume_cull (ClutterPaintVolume       *pv,
 }
 
 void
-_clutter_paint_volume_get_stage_paint_box (ClutterPaintVolume *pv,
-                                           ClutterStage *stage,
-                                           ClutterActorBox *box)
+_clutter_paint_volume_get_stage_paint_box (const ClutterPaintVolume *pv,
+                                           ClutterStage             *stage,
+                                           ClutterActorBox          *box)
 {
   ClutterPaintVolume projected_pv;
   graphene_matrix_t modelview;