diff --git a/app/core/gimplayerstack.c b/app/core/gimplayerstack.c
index fce4b6b35b..18b3e16460 100644
--- a/app/core/gimplayerstack.c
+++ b/app/core/gimplayerstack.c
@@ -136,19 +136,15 @@ gimp_layer_stack_reorder (GimpContainer *container,
 {
   GimpLayerStack *stack = GIMP_LAYER_STACK (container);
   gboolean        update_backdrop;
-  gint            index;
 
   update_backdrop = gimp_filter_get_active (GIMP_FILTER (object)) &&
                     gimp_layer_get_excludes_backdrop (GIMP_LAYER (object));
 
-  if (update_backdrop)
-    index = gimp_container_get_child_index (container, object);
-
   GIMP_CONTAINER_CLASS (parent_class)->reorder (container, object,
                                                 old_index, new_index);
 
   if (update_backdrop)
-    gimp_layer_stack_update_range (stack, index, new_index);
+    gimp_layer_stack_update_range (stack, old_index, new_index);
 }