diff --git a/python/plugins/processing/gui/wrappers.py b/python/plugins/processing/gui/wrappers.py
old mode 100644
new mode 100755
index 05b31c3cd5c..18c0001ef37
--- a/python/plugins/processing/gui/wrappers.py
+++ b/python/plugins/processing/gui/wrappers.py
@@ -1269,6 +1269,8 @@ class TableFieldWidgetWrapper(WidgetWrapper):
                 widget.addItem(self.NOT_SET, None)
             for f in fields:
                 widget.addItem(self.dialog.resolveValueDescription(f), f)
+            widget.setToolTip(
+                self.tr('Input parameter, or name of field (separate field names with ; for multiple field parameters)'))
             return widget
 
     def postInitialize(self, wrappers):
@@ -1297,6 +1299,8 @@ class TableFieldWidgetWrapper(WidgetWrapper):
         else:
             self.widget.setLayer(self._layer)
             self.widget.setCurrentIndex(0)
+        if self.param.defaultValue() is not None:
+            self.setValue(self.param.defaultValue())
 
     def getFields(self):
         if self._layer is None:
@@ -1322,7 +1326,7 @@ class TableFieldWidgetWrapper(WidgetWrapper):
                 options = self.widget.options
                 selected = []
                 for i, opt in enumerate(options):
-                    if opt in value:
+                    if opt in value or opt==value:
                         selected.append(i)
                 self.widget.setSelectedItems(selected)
             else:
diff --git a/python/plugins/processing/modeler/ModelerParameterDefinitionDialog.py b/python/plugins/processing/modeler/ModelerParameterDefinitionDialog.py
old mode 100644
new mode 100755
index 47b41f23bef..4faa3d92d90
--- a/python/plugins/processing/modeler/ModelerParameterDefinitionDialog.py
+++ b/python/plugins/processing/modeler/ModelerParameterDefinitionDialog.py
@@ -173,6 +173,16 @@ class ModelerParameterDefinitionDialog(QDialog):
             if self.param is not None:
                 self.multipleCheck.setChecked(self.param.allowMultiple())
             self.verticalLayout.addWidget(self.multipleCheck)
+
+            self.verticalLayout.addWidget(QLabel(self.tr('Default value')))
+            self.defaultTextBox = QLineEdit()
+            self.defaultTextBox.setToolTip(self.tr('Default field name, or ; separated list of field names for multiple field parameters'))
+            if self.param is not None:
+                default = self.param.defaultValue()
+                if default is not None:
+                    self.defaultTextBox.setText(str(default))
+            self.verticalLayout.addWidget(self.defaultTextBox)
+
         elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_BAND or \
                 isinstance(self.param, QgsProcessingParameterBand):
             self.verticalLayout.addWidget(QLabel(self.tr('Parent layer')))
@@ -339,7 +349,10 @@ class ModelerParameterDefinitionDialog(QDialog):
                 return
             parent = self.parentCombo.currentData()
             datatype = self.datatypeCombo.currentData()
-            self.param = QgsProcessingParameterField(name, description, None, parent, datatype, self.multipleCheck.isChecked())
+            default = self.defaultTextBox.text()
+            if not default:
+                default = None
+            self.param = QgsProcessingParameterField(name, description, defaultValue=default, parentLayerParameterName=parent, type=datatype, allowMultiple=self.multipleCheck.isChecked())
         elif (self.paramType == ModelerParameterDefinitionDialog.PARAMETER_BAND or
               isinstance(self.param, QgsProcessingParameterBand)):
             if self.parentCombo.currentIndex() < 0: