diff --git a/osc/build.py b/osc/build.py
index 7e864b88..1fd40b10 100644
--- a/osc/build.py
+++ b/osc/build.py
@@ -1177,7 +1177,7 @@ def main(apiurl, opts, argv):
                     def __del__(self):
                         self.cleanup()
 
-                    def __exit__(self):
+                    def __exit__(self, exc_type, exc_value, traceback):
                         self.cleanup()
 
                     def __str__(self):