diff --git a/gui/default/syncthing/core/syncthingController.js b/gui/default/syncthing/core/syncthingController.js
index 517663d94..6f11e81e3 100644
--- a/gui/default/syncthing/core/syncthingController.js
+++ b/gui/default/syncthing/core/syncthingController.js
@@ -3343,6 +3343,11 @@ angular.module('syncthing.core')
                 return 'checkbox';
             }
             if (value instanceof Array) {
+                if (value.some(function (element) {
+                    return typeof element !== 'number' && typeof element !== 'string';
+                })) {
+                    return 'skip';
+                }
                 return 'list';
             }
             if (typeof value === 'object') {
diff --git a/gui/default/syncthing/settings/advancedSettingsModalView.html b/gui/default/syncthing/settings/advancedSettingsModalView.html
index 37312e053..ae92c0150 100644
--- a/gui/default/syncthing/settings/advancedSettingsModalView.html
+++ b/gui/default/syncthing/settings/advancedSettingsModalView.html
@@ -18,8 +18,8 @@
               <div ng-repeat="(key, value) in advancedConfig.gui" ng-init="type = inputTypeFor(key, value)" ng-if="type != 'skip'" class="form-group">
                 <label for="guiInput{{$index}}" class="col-sm-4 control-label">{{key | uncamel}}&nbsp;<a href="{{docsURL('users/config#config-option-gui.')}}{{key | lowercase}}" target="_blank"><span class="fas fa-question-circle"></span></a></label>
                 <div class="col-sm-8">
-                  <input ng-if="inputTypeFor(key, value) == 'list'" id="guiInput{{$index}}" class="form-control" type="text" ng-model="advancedConfig.gui[key]" ng-list />
-                  <input ng-if="inputTypeFor(key, value) != 'list'" id="guiInput{{$index}}" class="form-control" type="{{inputTypeFor(key, value)}}" ng-model="advancedConfig.gui[key]" />
+                  <input ng-if="type == 'list'" id="guiInput{{$index}}" class="form-control" type="text" ng-model="advancedConfig.gui[key]" ng-list />
+                  <input ng-if="type != 'list'" id="guiInput{{$index}}" class="form-control" type="{{type}}" ng-model="advancedConfig.gui[key]" />
                 </div>
               </div>
             </form>