diff --git a/pytec/pytec/gui/view/param_tree.json b/pytec/pytec/gui/view/param_tree.json
index bf490dc..fff0a0d 100644
--- a/pytec/pytec/gui/view/param_tree.json
+++ b/pytec/pytec/gui/view/param_tree.json
@@ -284,10 +284,7 @@
                       "value":20,
                       "step":0.1,
                       "format":"{value:.4f} °C",
-                      "pid_autotune":[
-                         "target_temp",
-                         "ch"
-                      ]
+                      "pid_autotune":"target_temp"
                    },
                    {
                       "name":"Test Current",
@@ -300,10 +297,7 @@
                          2000
                       ],
                       "suffix":"mA",
-                      "pid_autotune":[
-                         "test_current",
-                         "ch"
-                      ]
+                      "pid_autotune":"test_current"
                    },
                    {
                       "name":"Temperature Swing",
@@ -312,10 +306,7 @@
                       "step":0.1,
                       "prefix":"±",
                       "format":"{value:.4f} °C",
-                      "pid_autotune":[
-                         "temp_swing",
-                         "ch"
-                      ]
+                      "pid_autotune":"temp_swing"
                    },
                    {
                      "name":"Lookback",
@@ -323,10 +314,7 @@
                      "value":3.0,
                      "step":0.1,
                      "format":"{value:.4f} s",
-                     "pid_autotune":[
-                        "lookback",
-                        "ch"
-                     ]
+                     "pid_autotune":"lookback"
                   },
                    {
                       "name":"Run",
diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index bb9f60e..70103fa 100644
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -285,9 +285,7 @@ class MainWindow(QtWidgets.QMainWindow):
                     inner_param.setOpts(lock=False)
 
                 if "pid_autotune" in inner_param.opts:
-                    auto_tuner_param = inner_param.opts["pid_autotune"][0]
-                    if inner_param.opts["pid_autotune"][1] != "ch":
-                        ch = inner_param.opts["pid_autotune"][1]
+                    auto_tuner_param = inner_param.opts["pid_autotune"]
                     self.autotuners.set_params(auto_tuner_param, ch, new_value)
 
                 if "activaters" in inner_param.opts: