diff --git a/bench/im_bench/src/im_bench.erl b/bench/im_bench/src/im_bench.erl
index 52ea53c..ff9560f 100644
--- a/bench/im_bench/src/im_bench.erl
+++ b/bench/im_bench/src/im_bench.erl
@@ -21,8 +21,8 @@ run([Clients], Slaves, Conf) ->
   RouterNodes = filter_nodes(Slaves, "router"),
   Domains = find_domains(Slaves),
   % Start the benchmark on the different client domains.
-  launcher:start(length(ServerNodes) div length(RouterNodes), 1,
-    length(ServerNodes), length(ClientNodes), Domains, length(Domains)),
+  launcher:start_bencherl(length(ServerNodes) div length(RouterNodes), 1,
+    length(ServerNodes), length(ClientNodes), Slaves),
   ClientDomains = find_domains(ClientNodes),
   lists:foreach(fun(D) ->
       logger:launch_latency("Bencherl_test", length(RouterNodes),