diff --git a/python/plugins/processing/modeler/ModelerParametersDialog.py b/python/plugins/processing/modeler/ModelerParametersDialog.py
index 2bdbf8a951af..857f3c9b66fb 100644
--- a/python/plugins/processing/modeler/ModelerParametersDialog.py
+++ b/python/plugins/processing/modeler/ModelerParametersDialog.py
@@ -269,6 +269,8 @@ def getWidgetFromParameter(self, param):
                 item.addItem(self.resolveValueDescription(layer), layer)
         elif isinstance(param, ParameterBoolean):
             item = QComboBox()
+            item.addItem('Yes')
+            item.addItem('No')
             bools = self.getAvailableValuesOfType(ParameterBoolean, None)
             for b in bools:
                 item.addItem(self.resolveValueDescription(b), b)