diff --git a/lib/bulletmark_repairer/associations_builder.rb b/lib/bulletmark_repairer/associations_builder.rb
index 88701f4..9f58564 100644
--- a/lib/bulletmark_repairer/associations_builder.rb
+++ b/lib/bulletmark_repairer/associations_builder.rb
@@ -6,7 +6,7 @@ module BulletmarkRepairer
   class AssociationsBuilder
     def build(marker)
       # TODO: Notify if fail to find suitable file to be patched
-      return unless marker.index
+      return if marker.skip?
 
       if associations[marker.index]
         associations[marker.index].add(marker)
diff --git a/lib/bulletmark_repairer/markers.rb b/lib/bulletmark_repairer/markers.rb
index 929f255..9fdba6d 100644
--- a/lib/bulletmark_repairer/markers.rb
+++ b/lib/bulletmark_repairer/markers.rb
@@ -43,6 +43,10 @@ def add_association(notification)
       @associations += notification.instance_variable_get(:@associations)
     end
 
+    def skip?
+      index.nil?
+    end
+
     def n_plus_one_in_view?
       @n_plus_one_in_view
     end