diff --git a/activerecord/lib/active_record/associations/join_dependency/join_part.rb b/activerecord/lib/active_record/associations/join_dependency/join_part.rb
index f70e277c76d8de332588240eb2dca9ce2bd53a83..80241054724ce94b699cb9a3df03b6f41de153cc 100644
--- a/activerecord/lib/active_record/associations/join_dependency/join_part.rb
+++ b/activerecord/lib/active_record/associations/join_dependency/join_part.rb
@@ -68,8 +68,9 @@ def extract_record(row)
 
           index = 0
           length = column_names_with_alias.length
+
           while index < length
-            column_name,alias_name = column_names_with_alias[index]
+            column_name, alias_name = column_names_with_alias[index]
             hash[column_name] = row[alias_name]
             index += 1
           end