diff --git a/benchs/run_benchs.ml b/benchs/run_benchs.ml
index ad756618..af191949 100644
--- a/benchs/run_benchs.ml
+++ b/benchs/run_benchs.ml
@@ -989,4 +989,5 @@ module Thread = struct
 end
 
 let () =
-  B.Tree.run_global ()
+  try B.Tree.run_global ()
+  with Arg.Help msg -> print_endline msg