diff --git a/lib/rom/factory/attributes/association.rb b/lib/rom/factory/attributes/association.rb
index 640017f..ffc286e 100644
--- a/lib/rom/factory/attributes/association.rb
+++ b/lib/rom/factory/attributes/association.rb
@@ -173,7 +173,7 @@ def call(attrs = EMPTY_HASH, parent, persist: true)
 
           structs = count.times.map do
             if persist && attrs[tpk]
-               attrs
+              attrs
             elsif persist
               builder.persistable.create(*traits, **attrs)
             else