diff --git a/src/c3nav/mapdata/models/geometry/space.py b/src/c3nav/mapdata/models/geometry/space.py
index be869439..37df1ac9 100644
--- a/src/c3nav/mapdata/models/geometry/space.py
+++ b/src/c3nav/mapdata/models/geometry/space.py
@@ -79,7 +79,7 @@ class SpaceGeometryMixin(GeometryMixin):
         force = force or self.all_geometry_changed
         if force or self.geometry_changed:
             changed_geometries.register(space.level_id, space.geometry.intersection(
-                self.geometry if force else self.get_changed_geometry()
+                unwrap_geom(self.geometry if force else self.get_changed_geometry())
             ))
 
     def details_display(self, **kwargs):