diff --git a/zuul/driver/github/githubconnection.py b/zuul/driver/github/githubconnection.py
index 29f236a..02cbfdb 100644
--- a/zuul/driver/github/githubconnection.py
+++ b/zuul/driver/github/githubconnection.py
@@ -724,10 +724,10 @@
             # installation -- change queues aren't likely to span more
             # than one installation.
             for project in projects:
-                installation_id = self.installation_map.get(project)
+                installation_id = self.installation_map.get(project.name)
                 if installation_id not in installation_ids:
                     installation_ids.add(installation_id)
-                    installation_projects.add(project)
+                    installation_projects.add(project.name)
         else:
             # We aren't in the context of a change queue and we just
             # need to query all installations.  This currently only