diff --git a/tracetools_analysis/launch/pingpong.launch.py b/tracetools_analysis/launch/pingpong.launch.py
index abe8973..e5934ac 100644
--- a/tracetools_analysis/launch/pingpong.launch.py
+++ b/tracetools_analysis/launch/pingpong.launch.py
@@ -23,6 +23,7 @@ def generate_launch_description():
     return LaunchDescription([
         Trace(
             session_name='pingpong',
+            events_kernel=[],
         ),
         Node(
             package='tracetools_test',