diff --git a/comictaggerlib/ui/talkeruigenerator.py b/comictaggerlib/ui/talkeruigenerator.py
index c2dcd18..3d0b737 100644
--- a/comictaggerlib/ui/talkeruigenerator.py
+++ b/comictaggerlib/ui/talkeruigenerator.py
@@ -336,7 +336,7 @@ def generate_source_option_tabs(
             elif option._guess_type() is str:
                 if option.choices is not None:
                     current_widget = generate_combobox(option, layout_grid)
-                elif option.dest.lower().endswith("password"):
+                elif option.dest.casefold().endswith("password"):
                     current_widget = generate_password_textbox(option, layout_grid)
                 else:
                     current_widget = generate_textbox(option, layout_grid)