diff --git a/map_machine/osm/osm_reader.py b/map_machine/osm/osm_reader.py
index bf1215d..f07b20c 100644
--- a/map_machine/osm/osm_reader.py
+++ b/map_machine/osm/osm_reader.py
@@ -236,6 +236,9 @@ class OSMWay(Tagged):
     def __repr__(self) -> str:
         return f"Way <{self.id_}> {self.nodes}"
 
+    def __hash__(self) -> int:
+        return self.id_
+
 
 @dataclass
 class OSMMember: