diff --git a/src/program/lwaftr/bench/bench.lua b/src/program/lwaftr/bench/bench.lua
index cad397520b..5e7822069d 100644
--- a/src/program/lwaftr/bench/bench.lua
+++ b/src/program/lwaftr/bench/bench.lua
@@ -37,5 +37,6 @@ function run(args)
    csv:add_app('sinkv6', { 'input' }, { input='Encapsulation' })
    csv:activate()
 
+   app.busywait = true
    app.main({duration=opts.duration})
 end
diff --git a/src/program/lwaftr/run/run.lua b/src/program/lwaftr/run/run.lua
index dc250fd9f2..3f314d9a60 100644
--- a/src/program/lwaftr/run/run.lua
+++ b/src/program/lwaftr/run/run.lua
@@ -105,6 +105,7 @@ function run(args)
       csv:activate()
    end
 
+   engine.busywait = true
    if opts.duration then
       engine.main({duration=opts.duration, report={showlinks=true}})
    else
diff --git a/src/program/lwaftr/transient/transient.lua b/src/program/lwaftr/transient/transient.lua
index 6ba76884e4..38aec2e2c9 100644
--- a/src/program/lwaftr/transient/transient.lua
+++ b/src/program/lwaftr/transient/transient.lua
@@ -129,5 +129,6 @@ function run(args)
                   { rx=stream.name..' TX', tx=stream.name..' RX' })
    end
    csv:activate()
+   engine.busywait = true
    engine.main({duration=opts.duration*((opts.bitrate/opts.step)*2+1)})
 end