diff --git a/openapi/preprocess_spec.py b/openapi/preprocess_spec.py
index a0e70bd..5d63a62 100644
--- a/openapi/preprocess_spec.py
+++ b/openapi/preprocess_spec.py
@@ -96,10 +96,10 @@ def remove_watch_operations(op, parent, operation_ids):
 
 def strip_tags_from_operation_id(operation, _):
     operation_id = operation['operationId']
-    for t in operation['tags']:
-        operation_id = operation_id.replace(_to_camel_case(t), '')
-    operation['operationId'] = operation_id
-
+    if 'tags' in operation:
+        for t in operation['tags']:
+            operation_id = operation_id.replace(_to_camel_case(t), '')
+        operation['operationId'] = operation_id
 
 def add_custom_objects_spec(spec):
     with open(CUSTOM_OBJECTS_SPEC_PATH, 'r') as custom_objects_spec_file:
@@ -123,7 +123,7 @@ def process_swagger(spec, client_language):
         apply_func_to_spec_operations(
             spec, remove_watch_operations, operation_ids)
     except PreprocessingException as e:
-        print(e.message)
+        print(e)
 
     remove_model_prefixes(spec)