diff --git a/examples/tree_1d_dgsem/elixir_euler_source_terms.jl b/examples/tree_1d_dgsem/elixir_euler_source_terms.jl
index 017f921b635..cb8a09057d9 100644
--- a/examples/tree_1d_dgsem/elixir_euler_source_terms.jl
+++ b/examples/tree_1d_dgsem/elixir_euler_source_terms.jl
@@ -48,7 +48,7 @@ time_series = TimeSeriesCallback(semi, [0.0, 0.33, 1.0], interval = 10)
 
 callbacks = CallbackSet(summary_callback,
                         analysis_callback, alive_callback,
-                        save_solution, 
+                        save_solution,
                         time_series,
                         stepsize_callback)