diff --git a/harvey/locks.py b/harvey/locks.py
index dab504d..8e85109 100644
--- a/harvey/locks.py
+++ b/harvey/locks.py
@@ -12,7 +12,7 @@ def retrieve_lock(project_name: str) -> Dict[str, bool]:
 
     return {
         'locked': lock_status['locked'],
-        'system_lock': lock_status['system_lock'],
+        'system_lock': lock_status.get('system_lock'),
     }
 
 
diff --git a/harvey/repos/locks.py b/harvey/repos/locks.py
index 02d6826..cf38289 100644
--- a/harvey/repos/locks.py
+++ b/harvey/repos/locks.py
@@ -67,7 +67,7 @@ def retrieve_locks(request: flask.Request) -> Dict[str, List[Any]]:
                 {
                     'project': key,
                     'locked': values['locked'],
-                    'system_lock': values['system_lock'],
+                    'system_lock': values.get('system_lock'),
                 }
             )