diff --git a/src/c3nav/editor/forms.py b/src/c3nav/editor/forms.py
index 9ff2d295..6f07e004 100644
--- a/src/c3nav/editor/forms.py
+++ b/src/c3nav/editor/forms.py
@@ -88,7 +88,7 @@ def create_editor_form(mapitemtype):
     possible_fields = ['name', 'public', 'altitude', 'level', 'intermediate', 'levels', 'geometry', 'direction',
                        'elevator', 'button', 'crop_to_level', 'width', 'groups', 'override_altitude', 'color',
                        'location_type', 'can_search', 'can_describe', 'routing_inclusion', 'compiled_room', 'bssids',
-                       'categories', 'layer']
+                       'category', 'layer']
     existing_fields = [field.name for field in mapitemtype._meta.get_fields() if field.name in possible_fields]
 
     class EditorForm(MapitemFormMixin, ModelForm):