diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index 7989421..26fc706 100644
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -266,10 +266,9 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
                 await asyncio.gather(*[self.tec_client._command(x.format(value=data)) for x in param.opts["commands"]])
 
     def _set_param_tree(self):
-        self.ch0_tree.setParameters(params[0], showTop=False)
-        self.ch1_tree.setParameters(params[1], showTop=False)
-        params[0].sigTreeStateChanged.connect(self.send_command)
-        params[1].sigTreeStateChanged.connect(self.send_command)
+        for i, tree in enumerate((self.ch0_tree, self.ch1_tree)):
+            tree.setParameters(params[i], showTop=False)
+            params[i].sigTreeStateChanged.connect(self.send_command)
 
     @pyqtSlot(list)
     def update_pid(self, pid_settings):