diff --git a/endpoints/api/discovery.py b/endpoints/api/discovery.py
index 70a48664d..fd1a09f08 100644
--- a/endpoints/api/discovery.py
+++ b/endpoints/api/discovery.py
@@ -125,9 +125,11 @@ def swagger_route_data(include_internal=False, compact=False):
         continue
 
       operation_swagger = {
-        'operationId': method_metadata(method, 'nickname') or 'unnamed',
+        'operationId': method_metadata(method, 'nickname'),
         'parameters': [],
       }
+      if operation_swagger['operationId'] is None:
+        continue
 
       if not compact:
         operation_swagger.update({