diff --git a/python/plugins/processing/algs/otb/OtbChoiceWidget.py b/python/plugins/processing/algs/otb/OtbChoiceWidget.py
index 7ea0ed94510..ab6d2055709 100644
--- a/python/plugins/processing/algs/otb/OtbChoiceWidget.py
+++ b/python/plugins/processing/algs/otb/OtbChoiceWidget.py
@@ -70,10 +70,10 @@ class OtbChoiceWidgetWrapper(WidgetWrapper):
 
         #Fur Qgis modeler
         else:
-            if name in self.dialog.wrappers:
-                self.__setWrapperVisibility(self.dialog.wrappers[name], visible)
-            if name in self.dialog.widget_labels:
-                self.dialog.widget_labels[name].setVisible(visible)
+            if name in self.dialog.widget.widget.wrappers:
+                self.__setWrapperVisibility(self.dialog.widget.widget.wrappers[name], visible)
+            if name in self.dialog.widget.widget.widget_labels:
+                self.dialog.widget.widget.widget_labels[name].setVisible(visible)
 
     def __setWrapperVisibility(self, wrapper, v):
         # For compatibility with 3.x API, we need to check whether the wrapper is
diff --git a/python/plugins/processing/modeler/ModelerParametersDialog.py b/python/plugins/processing/modeler/ModelerParametersDialog.py
index 5cbd17cb5d9..bf88f079bd1 100644
--- a/python/plugins/processing/modeler/ModelerParametersDialog.py
+++ b/python/plugins/processing/modeler/ModelerParametersDialog.py
@@ -486,8 +486,6 @@ class ModelerParametersWidget(QWidget):
 
         self.widget = ModelerParametersPanelWidget(alg, model, algName, configuration, dialog, context)
 
-        self.widget_labels = {}
-
         class ContextGenerator(QgsProcessingContextGenerator):
 
             def __init__(self, context):