diff --git a/rclpy/rclpy/qos_event.py b/rclpy/rclpy/qos_event.py
index 954e04e8f..e3c0ab427 100644
--- a/rclpy/rclpy/qos_event.py
+++ b/rclpy/rclpy/qos_event.py
@@ -140,7 +140,7 @@ async def execute(self, taken_data):
         """Execute work after data has been taken from a ready wait set."""
         if not taken_data:
             return
-        await rclpy.executors.await_or_execute(self.callback, [taken_data])
+        await rclpy.executors.await_or_execute(self.callback, taken_data)
 
     def get_num_entities(self):
         """Return number of each type of entity used."""