diff --git a/backend/crud.py b/backend/crud.py
index d592091..296e482 100644
--- a/backend/crud.py
+++ b/backend/crud.py
@@ -67,8 +67,8 @@ def items_for_trip(db: Session, user_id: UUID_t, trip: models.Trip, selected_tag
             if not item_tag_ids:
                 result.append(it)
             elif mandatory_tag_ids:
-                # Only include if at least one mandatory tag is selected
-                if selected_set & mandatory_tag_ids:
+                # Nur aufnehmen, wenn ALLE mandatory tags ausgewählt sind
+                if mandatory_tag_ids <= selected_set:
                     result.append(it)
             elif selected_set & item_tag_ids:
                 result.append(it)