diff --git a/app/services/csv/lettings_log_csv_service.rb b/app/services/csv/lettings_log_csv_service.rb
index 6f1971c8a..a034d6a04 100644
--- a/app/services/csv/lettings_log_csv_service.rb
+++ b/app/services/csv/lettings_log_csv_service.rb
@@ -237,7 +237,7 @@ module Csv
 
     def person_details_not_known?(log, attribute)
       details_known_field = PERSON_DETAILS.find { |key, _value| key == attribute }[1]["details_known_field"]
-      log[details_known_field] == 1 # Different in sales logs
+      log[details_known_field] == 1
     end
   end
 end
diff --git a/app/services/csv/sales_log_csv_service.rb b/app/services/csv/sales_log_csv_service.rb
index 1b3aa5714..beeb19271 100644
--- a/app/services/csv/sales_log_csv_service.rb
+++ b/app/services/csv/sales_log_csv_service.rb
@@ -141,7 +141,7 @@ module Csv
 
     def person_details_not_known?(log, attribute)
       details_known_field = PERSON_DETAILS.find { |key, _value| key == attribute }[1]["details_known_field"]
-      log[details_known_field] == 2 # Different to lettings logs
+      log[details_known_field] == 1
     end
   end
 end