diff --git a/site_ansto/instrument/runsics.py b/site_ansto/instrument/runsics.py
index 85cc110f..45a7473a 100755
--- a/site_ansto/instrument/runsics.py
+++ b/site_ansto/instrument/runsics.py
@@ -120,7 +120,7 @@ def stop_cmd(server, args):
             print 'Failed again!'
             print "Terminating PID %d with EXTREME PREJUDICE (-15)" % (pid)
             subprocess.call(shlex.split('sudo -u %s /bin/kill -15 %d' %
-                                        sics_killer, (pid)))
+                                        (sics_killer, pid)))
         else:
             return
         if status_cmd(server, args) != (0,0):