diff --git a/fluents/selections.py b/fluents/selections.py
index f2d5fb4..cbb732e 100644
--- a/fluents/selections.py
+++ b/fluents/selections.py
@@ -202,6 +202,7 @@ class SelectionListController:
                 store.insert_after(None, None, values)
 
     def add_dataset(self, dataset):
+        self._ensure_selection_store(dataset.get_dim_name(0))
         store = self._sel_stores[dataset.get_dim_name(0)]
         di = self._get_dataset_iter(dataset)
         if not di: