diff --git a/rclpy/executors/examples_rclpy_executors/custom_executor.py b/rclpy/executors/examples_rclpy_executors/custom_executor.py
index 6b18bf14..a6df7d25 100644
--- a/rclpy/executors/examples_rclpy_executors/custom_executor.py
+++ b/rclpy/executors/examples_rclpy_executors/custom_executor.py
@@ -67,7 +67,7 @@ def spin_once(self, timeout_sec=None):
         """
         # wait_for_ready_callbacks yields callbacks that are ready to be executed
         try:
-            handler, group, node = next(self.wait_for_ready_callbacks(timeout_sec=timeout_sec))
+            handler, group, node = self.wait_for_ready_callbacks(timeout_sec=timeout_sec)
         except StopIteration:
             pass
         else: