diff --git a/hagadias/qudobject_props.py b/hagadias/qudobject_props.py
index a184c50..253a452 100644
--- a/hagadias/qudobject_props.py
+++ b/hagadias/qudobject_props.py
@@ -2565,7 +2565,10 @@ def unidentifiedaltname(self) -> str | None:
                     return "small *color* tube"
                 else:
                     alt_obj_name = alt_obj_name if alt_obj_name is not None else "BaseUnknown"
-                    alt_obj = self.qindex[alt_obj_name]
+                    try:
+                        alt_obj = self.qindex[alt_obj_name]
+                    except KeyError:
+                        alt_obj = self.qindex["BaseUnknown"]
                     alt_name = QudObjectProps.title.__get__(alt_obj)
                     return alt_name