diff --git a/k4FWCore/scripts/k4run b/k4FWCore/scripts/k4run
index 710fd67c..f0a8f48f 100755
--- a/k4FWCore/scripts/k4run
+++ b/k4FWCore/scripts/k4run
@@ -95,6 +95,7 @@ if __name__ == "__main__":
     handler.setFormatter(formatter)
     logger.addHandler(handler)
 
+    global parser
     parser = argparse.ArgumentParser(description="Run job in the Key4HEP framework")
     parser.add_argument("config_files", type=open, action=LoadFromFile, nargs="*",
                         help="Gaudi config (python) files describing the job")