diff --git a/roles/taskotron/buildmaster-configure/templates/taskotron.master.cfg.j2 b/roles/taskotron/buildmaster-configure/templates/taskotron.master.cfg.j2
index 6dff48001b..a6c796b914 100644
--- a/roles/taskotron/buildmaster-configure/templates/taskotron.master.cfg.j2
+++ b/roles/taskotron/buildmaster-configure/templates/taskotron.master.cfg.j2
@@ -181,7 +181,7 @@ factory.addStep(FileUpload(slavesrc="/var/log/taskotron/taskotron.log",
                            masterdest=Interpolate('{{ public_artifacts_dir }}/%(prop:uuid)s/taskotron.log')))
 
 # change permissions for uuid dir to be accessible via http
-factory.addStep(ShellCommand(command=["chmod", '-R', '0755', Interpolate('{{ public_artifacts_dir }}/%(prop:uuid)s/')])
+factory.addStep(ShellCommand(command=["chmod", '-R', '0755', Interpolate('{{ public_artifacts_dir }}/%(prop:uuid)s/')]))
 
 {% else %}
 # capture the taskotron log