diff --git a/TaskB04/run b/TaskB04/run
index 7b2ac6d..2f240d3 100644
--- a/TaskB04/run
+++ b/TaskB04/run
@@ -48,7 +48,7 @@ for line in sys.stdin:
     auto.add_node(line)
 	
 print(sys.argv)
-print(os.listdir(os.curdir + 'TaskB04'))
+print(os.listdir(os.path.join(os.curdir,'TaskB04')))
 
 shutil.copy(
     sys.argv[1].replace('.arg', '.exp'),