diff --git a/opsgenie_sdk/models/responder.py b/opsgenie_sdk/models/responder.py
index 834b623..886ac4a 100644
--- a/opsgenie_sdk/models/responder.py
+++ b/opsgenie_sdk/models/responder.py
@@ -145,3 +145,6 @@ def __eq__(self, other):
     def __ne__(self, other):
         """Returns true if both objects are not equal"""
         return not self == other
+
+    def __hash__(self):
+        return hash(self.type + self.id)