diff --git a/activerecord/lib/active_record/associations/association_collection.rb b/activerecord/lib/active_record/associations/association_collection.rb
index 7964f4fa2b42b70f670088182a0816125c591782..8bb32400cfc5908aa5bdacf1c3cde21377120e93 100644
--- a/activerecord/lib/active_record/associations/association_collection.rb
+++ b/activerecord/lib/active_record/associations/association_collection.rb
@@ -488,7 +488,7 @@ def create_record(attrs, &block)
           ensure_owner_is_persisted!
 
           transaction do
-            with_scope(:create => @scope[:create].merge(scoped.where_values_hash || {})) do
+            with_scope(:create => @scope[:create].merge(scoped.where_values_hash)) do
               build_record(attrs, &block)
             end
           end