diff --git a/tools/rosgraph/test/test_roslogging_user_logger.py b/tools/rosgraph/test/test_roslogging_user_logger.py
index a40d4d8f09..4e71ef0cb6 100644
--- a/tools/rosgraph/test/test_roslogging_user_logger.py
+++ b/tools/rosgraph/test/test_roslogging_user_logger.py
@@ -51,7 +51,7 @@
 
 # set user defined custom logger
 class UserCustomLogger(logging.Logger):
-    def findCaller(self, stack_info=False):
+    def findCaller(self, stack_info=False, stacklevel=1):
         """Returns static caller.
 
         This method is being overwritten in rosgraph.roslogging.