diff --git a/src/bonsai/bonsai/bim/module/spatial/prop.py b/src/bonsai/bonsai/bim/module/spatial/prop.py
index 90acfbea2a..c2b1def5b6 100644
--- a/src/bonsai/bonsai/bim/module/spatial/prop.py
+++ b/src/bonsai/bonsai/bim/module/spatial/prop.py
@@ -65,6 +65,8 @@ def update_name(self, context):
 
 def update_active_container_index(self, context):
     SpatialDecompositionData.data["subelement_class"] = SpatialDecompositionData.subelement_class()
+    if tool.Blender.get_enum_safe(self, "subelement_class") is None:
+        self.subelement_class = SpatialDecompositionData.data["subelement_class"][0][0]
     tool.Spatial.load_contained_elements()