diff --git a/app/services/bulk_upload/lettings/year2023/row_parser.rb b/app/services/bulk_upload/lettings/year2023/row_parser.rb
index 987e52a47..782943492 100644
--- a/app/services/bulk_upload/lettings/year2023/row_parser.rb
+++ b/app/services/bulk_upload/lettings/year2023/row_parser.rb
@@ -1608,7 +1608,7 @@ private
     field_127.present? ? 1 : 0
   end
 
-  def downcase(str)
-    downcase_first_letter(str)
+  def downcase(sentence)
+    downcase_first_letter(sentence)
   end
 end
diff --git a/app/services/bulk_upload/lettings/year2024/row_parser.rb b/app/services/bulk_upload/lettings/year2024/row_parser.rb
index 36d60d556..ec1fef50c 100644
--- a/app/services/bulk_upload/lettings/year2024/row_parser.rb
+++ b/app/services/bulk_upload/lettings/year2024/row_parser.rb
@@ -1643,7 +1643,7 @@ private
     Organisation.find(bulk_upload.organisation_id)
   end
 
-  def downcase(str)
-    downcase_first_letter(str)
+  def downcase(sentence)
+    downcase_first_letter(sentence)
   end
 end
diff --git a/app/services/bulk_upload/sales/year2023/row_parser.rb b/app/services/bulk_upload/sales/year2023/row_parser.rb
index be646d422..ed42445b0 100644
--- a/app/services/bulk_upload/sales/year2023/row_parser.rb
+++ b/app/services/bulk_upload/sales/year2023/row_parser.rb
@@ -1336,7 +1336,7 @@ private
     end
   end
 
-  def downcase(str)
-    downcase_first_letter(str)
+  def downcase(sentence)
+    downcase_first_letter(sentence)
   end
 end
diff --git a/app/services/bulk_upload/sales/year2024/row_parser.rb b/app/services/bulk_upload/sales/year2024/row_parser.rb
index 8aeb12bd0..3607e8c05 100644
--- a/app/services/bulk_upload/sales/year2024/row_parser.rb
+++ b/app/services/bulk_upload/sales/year2024/row_parser.rb
@@ -1510,7 +1510,7 @@ private
     Organisation.find(bulk_upload.organisation_id)
   end
 
-  def downcase(str)
-    downcase_first_letter(str)
+  def downcase(sentence)
+    downcase_first_letter(sentence)
   end
 end