diff --git a/malcolm/modules/scanning/parts/shutterpart.py b/malcolm/modules/scanning/parts/shutterpart.py
index <HASH>..<HASH> 100644
--- a/malcolm/modules/scanning/parts/shutterpart.py
+++ b/malcolm/modules/scanning/parts/shutterpart.py
@@ -34,8 +34,8 @@ class ShutterPart(CAChoicePart):
                  config=True  # type: util.AConfig
                  ):
         # type: (...) -> None
-        super(ShutterPart, self).__init__(name, description, pv, rbv, rbv_suffix, min_delta, timeout, sink_port,
-                                          widget, group, config)
+        super(ShutterPart, self).__init__(name, description, pv, rbv, rbv_suffix, min_delta,
+                                          timeout, sink_port, widget, group, config)
 
         self.open_value = open_value
         self.close_value = close_value
ShutterPart: breaking up call to super line to reduce length