diff --git a/artiq/examples/kasli_shuttler/repository/shuttler.py b/artiq/examples/kasli_shuttler/repository/shuttler.py
index 9a0b4e517..730573d95 100644
--- a/artiq/examples/kasli_shuttler/repository/shuttler.py
+++ b/artiq/examples/kasli_shuttler/repository/shuttler.py
@@ -101,8 +101,7 @@ class Shuttler(EnvExperiment):
 
         print_rpc("Example Waveforms are on OUT0 and OUT1")
         self.core.break_realtime()
-        #while not(self.scheduler.check_termination()):
-        while True:
+        while not(self.scheduler.check_termination()):
             self.core.delay(1.*s)
             self.example_waveform()