diff --git a/source/blender/blenkernel/BKE_object.h b/source/blender/blenkernel/BKE_object.h
index ec780ea6f8a..69ff9765a93 100644
--- a/source/blender/blenkernel/BKE_object.h
+++ b/source/blender/blenkernel/BKE_object.h
@@ -255,7 +255,7 @@ typedef enum eObjectSet {
 	OB_SET_ALL       /* All Objects      */
 } eObjectSet;
 
-struct LinkNode *BKE_object_relational_superset(struct Scene *scene, struct SceneLayer *scene_layer, eObjectSet objectSet, eObRelationTypes includeFilter);
+struct LinkNode *BKE_object_relational_superset(struct SceneLayer *scene_layer, eObjectSet objectSet, eObRelationTypes includeFilter);
 struct LinkNode *BKE_object_groups(struct Object *ob);
 void             BKE_object_groups_clear(struct Object *object);
 
diff --git a/source/blender/blenkernel/intern/object.c b/source/blender/blenkernel/intern/object.c
index 9f71d6ca14d..d7754b1ee62 100644
--- a/source/blender/blenkernel/intern/object.c
+++ b/source/blender/blenkernel/intern/object.c
@@ -3306,20 +3306,13 @@ static void obrel_list_add(LinkNode **links, Object *ob)
  * If OB_SET_VISIBLE or OB_SET_SELECTED are collected, 
  * then also add related objects according to the given includeFilters.
  */
-LinkNode *BKE_object_relational_superset(struct Scene *scene, struct SceneLayer *scene_layer, eObjectSet objectSet, eObRelationTypes includeFilter)
+LinkNode *BKE_object_relational_superset(struct SceneLayer *scene_layer, eObjectSet objectSet, eObRelationTypes includeFilter)
 {
 	LinkNode *links = NULL;
 
 	Base *base;
 
 	/* Remove markers from all objects */
-	/* XXX: Do we need the scene here at all?
-	 *      See scene_layer below (gaia)
-	 */
-	for (base = scene->base.first; base; base = base->next) {
-		base->object->id.tag &= ~LIB_TAG_DOIT;
-	}
-
 	for (base = scene_layer->object_bases.first; base; base = base->next) {
 		base->object->id.tag &= ~LIB_TAG_DOIT;
 	}
diff --git a/source/blender/collada/collada.cpp b/source/blender/collada/collada.cpp
index 42d3758d121..25673cae9d6 100644
--- a/source/blender/collada/collada.cpp
+++ b/source/blender/collada/collada.cpp
@@ -125,7 +125,7 @@ int collada_export(Scene *sce,
 	if (export_settings.include_children) includeFilter |= OB_REL_CHILDREN_RECURSIVE;
 
 	eObjectSet objectSet = (export_settings.selected) ? OB_SET_SELECTED : OB_SET_ALL;
-	export_settings.export_set = BKE_object_relational_superset(sce, scene_layer, objectSet, (eObRelationTypes)includeFilter);
+	export_settings.export_set = BKE_object_relational_superset(scene_layer, objectSet, (eObRelationTypes)includeFilter);
 	int export_count = BLI_linklist_count(export_settings.export_set);
 
 	if (export_count == 0) {