diff --git a/src/c3nav/mapdata/models/base.py b/src/c3nav/mapdata/models/base.py
index 372e140e..7d8f7902 100644
--- a/src/c3nav/mapdata/models/base.py
+++ b/src/c3nav/mapdata/models/base.py
@@ -20,8 +20,6 @@ class MapItem(models.Model, metaclass=MapItemMeta):
     package = models.ForeignKey('mapdata.Package', on_delete=models.CASCADE, verbose_name=_('map package'))
 
     EditorForm = None
-    geomtype = None
-    color = None
 
     @classmethod
     def get_path_prefix(cls):
diff --git a/src/c3nav/mapdata/models/geometry.py b/src/c3nav/mapdata/models/geometry.py
index cd0b20fd..68756f6a 100644
--- a/src/c3nav/mapdata/models/geometry.py
+++ b/src/c3nav/mapdata/models/geometry.py
@@ -26,6 +26,8 @@ class GeometryMapItem(MapItem, metaclass=GeometryMapItemMeta):
     level = models.ForeignKey('mapdata.Level', on_delete=models.CASCADE, verbose_name=_('level'))
     geometry = GeometryField()
 
+    geomtype = None
+
     class Meta:
         abstract = True