diff --git a/pyopencl/check_concurrency.py b/pyopencl/check_concurrency.py
index 414016e18b8eb0b63cfeb77d225149caaae90315..3bce3aefb08e026998d5629e00631a9e1d439970 100644
--- a/pyopencl/check_concurrency.py
+++ b/pyopencl/check_concurrency.py
@@ -59,7 +59,6 @@ def print_menu(ops):
     m = {"count": 1}
 
     def print_option(text):
-        nonlocal m
         print('    [%2d] %s' % (m["count"], text))
         m["count"] += 1