diff --git a/autotests/util/iwd.py b/autotests/util/iwd.py
index 4fa26517..6b153ea7 100755
--- a/autotests/util/iwd.py
+++ b/autotests/util/iwd.py
@@ -1009,23 +1009,26 @@ class IWD(AsyncOpAbstract):
 
     @staticmethod
     def _wait_for_object_condition(obj, condition_str, max_wait = 50):
-        obj._wait_timed_out = False
+        class TimeoutData:
+            _wait_timed_out = False
 
-        def wait_timeout_cb():
-            obj._wait_timed_out = True
+        data = TimeoutData()
+
+        def wait_timeout_cb(data):
+            data._wait_timed_out = True
             return False
 
         try:
-            timeout = GLib.timeout_add_seconds(max_wait, wait_timeout_cb)
+            timeout = GLib.timeout_add_seconds(max_wait, wait_timeout_cb, data)
             context = ctx.mainloop.get_context()
             while not eval(condition_str):
                 context.iteration(may_block=True)
-                if obj._wait_timed_out and ctx.args.gdb == None:
+                if data._wait_timed_out and ctx.args.gdb == None:
                     raise TimeoutError('[' + condition_str + ']'\
                                        ' condition was not met in '\
                                        + str(max_wait) + ' sec')
         finally:
-            if not obj._wait_timed_out:
+            if not data._wait_timed_out:
                 GLib.source_remove(timeout)
 
     def wait_for_object_condition(self, *args, **kwargs):