diff --git a/quadkey/__init__.py b/quadkey/__init__.py
index 61f7a75..6e9e3da 100644
--- a/quadkey/__init__.py
+++ b/quadkey/__init__.py
@@ -109,6 +109,9 @@ def __str__(self):
     def __repr__(self):
         return self.key
 
+    def __hash__(self):
+        return hash(self.key)
+
 def from_geo(geo, level):
     """
     Constucts a quadkey representation from geo and level