diff --git a/tailbone/views/master.py b/tailbone/views/master.py
index 1028ff27..6e05c35d 100644
--- a/tailbone/views/master.py
+++ b/tailbone/views/master.py
@@ -5441,7 +5441,7 @@ class MasterView(View):
             for template in self.normalize_input_file_templates(
                     include_file_options=True):
                 settings[template['setting_mode']] = template['mode']
-                settings[template['setting_file']] = template['file']
+                settings[template['setting_file']] = template['file'] or ''
                 settings[template['setting_url']] = template['url']
                 file_options[template['key']] = template['file_options']
                 file_option_dirs[template['key']] = template['file_options_dir']
@@ -5457,7 +5457,7 @@ class MasterView(View):
             for template in self.normalize_output_file_templates(
                     include_file_options=True):
                 settings[template['setting_mode']] = template['mode']
-                settings[template['setting_file']] = template['file']
+                settings[template['setting_file']] = template['file'] or ''
                 settings[template['setting_url']] = template['url']
                 file_options[template['key']] = template['file_options']
                 file_option_dirs[template['key']] = template['file_options_dir']