diff --git a/python/plugins/processing/modeler/ModelerParameterDefinitionDialog.py b/python/plugins/processing/modeler/ModelerParameterDefinitionDialog.py
index e2ff6b32311..d144d6be4e5 100755
--- a/python/plugins/processing/modeler/ModelerParameterDefinitionDialog.py
+++ b/python/plugins/processing/modeler/ModelerParameterDefinitionDialog.py
@@ -39,7 +39,6 @@ from qgis.PyQt.QtWidgets import (QDialog,
                                  QTextEdit)
 
 from qgis.gui import (QgsExpressionLineEdit,
-                      QgsProjectionSelectionWidget,
                       QgsProcessingLayerOutputDestinationWidget
                       )
 from qgis.core import (QgsApplication,
@@ -91,7 +90,6 @@ class ModelerParameterDefinitionDialog(QDialog):
                          parameters.PARAMETER_SCALE,
                          parameters.PARAMETER_EXPRESSION,
                          parameters.PARAMETER_POINT,
-                         parameters.PARAMETER_CRS,
                          parameters.PARAMETER_ENUM,
                          parameters.PARAMETER_MATRIX,
                          parameters.PARAMETER_MAP_LAYER):
@@ -106,7 +104,6 @@ class ModelerParameterDefinitionDialog(QDialog):
                                 QgsProcessingParameterScale,
                                 QgsProcessingParameterExpression,
                                 QgsProcessingParameterPoint,
-                                QgsProcessingParameterCrs,
                                 QgsProcessingParameterEnum,
                                 QgsProcessingParameterMatrix,
                                 QgsProcessingParameterMapLayer,
@@ -339,15 +336,6 @@ class ModelerParameterDefinitionDialog(QDialog):
             if self.param is not None:
                 self.defaultTextBox.setText(self.param.defaultValue())
             self.verticalLayout.addWidget(self.defaultTextBox)
-        elif (self.paramType == parameters.PARAMETER_CRS
-              or isinstance(self.param, QgsProcessingParameterCrs)):
-            self.verticalLayout.addWidget(QLabel(self.tr('Default value')))
-            self.selector = QgsProjectionSelectionWidget()
-            if self.param is not None:
-                self.selector.setCrs(QgsCoordinateReferenceSystem(self.param.defaultValue()))
-            else:
-                self.selector.setCrs(QgsCoordinateReferenceSystem('EPSG:4326'))
-            self.verticalLayout.addWidget(self.selector)
         elif self.paramType == parameters.PARAMETER_ENUM or \
                 isinstance(self.param, QgsProcessingParameterEnum):
             self.widget = EnumModelerWidget(self)
@@ -548,9 +536,6 @@ class ModelerParameterDefinitionDialog(QDialog):
               or isinstance(self.param, QgsProcessingParameterPoint)):
             self.param = QgsProcessingParameterPoint(name, description,
                                                      str(self.defaultTextBox.text()))
-        elif (self.paramType == parameters.PARAMETER_CRS
-              or isinstance(self.param, QgsProcessingParameterCrs)):
-            self.param = QgsProcessingParameterCrs(name, description, self.selector.crs().authid())
         elif (self.paramType == parameters.PARAMETER_ENUM
                 or isinstance(self.param, QgsProcessingParameterEnum)):
             self.param = QgsProcessingParameterEnum(name, description, self.widget.options(), self.widget.allowMultiple(), self.widget.defaultOptions())
diff --git a/src/gui/processing/qgsprocessingwidgetwrapperimpl.cpp b/src/gui/processing/qgsprocessingwidgetwrapperimpl.cpp
index f5ac21c872c..1276d3f47c9 100644
--- a/src/gui/processing/qgsprocessingwidgetwrapperimpl.cpp
+++ b/src/gui/processing/qgsprocessingwidgetwrapperimpl.cpp
@@ -238,6 +238,32 @@ QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingBooleanWidgetWrappe
 // QgsProcessingCrsWidgetWrapper
 //
 
+QgsProcessingCrsParameterDefinitionWidget::QgsProcessingCrsParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
+  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
+{
+  QVBoxLayout *vlayout = new QVBoxLayout();
+  vlayout->setMargin( 0 );
+  vlayout->setContentsMargins( 0, 0, 0, 0 );
+
+  vlayout->addWidget( new QLabel( tr( "Default value" ) ) );
+
+  mCrsSelector = new QgsProjectionSelectionWidget();
+  if ( const QgsProcessingParameterCrs *crsParam = dynamic_cast<const QgsProcessingParameterCrs *>( definition ) )
+    mCrsSelector->setCrs( QgsProcessingParameters::parameterAsCrs( crsParam, crsParam->defaultValue(), context ) );
+  else
+    mCrsSelector->setCrs( QgsCoordinateReferenceSystem( QStringLiteral( "EPSG:4326" ) ) );
+
+  vlayout->addWidget( mCrsSelector );
+  setLayout( vlayout );
+}
+
+QgsProcessingParameterDefinition *QgsProcessingCrsParameterDefinitionWidget::createParameter( const QString &name, const QString &description, QgsProcessingParameterDefinition::Flags flags ) const
+{
+  auto param = qgis::make_unique< QgsProcessingParameterCrs >( name, description, mCrsSelector->crs().authid() );
+  param->setFlags( flags );
+  return param.release();
+}
+
 QgsProcessingCrsWidgetWrapper::QgsProcessingCrsWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type, QWidget *parent )
   : QgsAbstractProcessingParameterWidgetWrapper( parameter, type, parent )
 {
@@ -364,6 +390,11 @@ QgsAbstractProcessingParameterWidgetWrapper *QgsProcessingCrsWidgetWrapper::crea
   return new QgsProcessingCrsWidgetWrapper( parameter, type );
 }
 
+QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingCrsWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
+{
+  return new QgsProcessingCrsParameterDefinitionWidget( context, widgetContext, definition, algorithm );
+}
+
 
 
 //
diff --git a/src/gui/processing/qgsprocessingwidgetwrapperimpl.h b/src/gui/processing/qgsprocessingwidgetwrapperimpl.h
index eec7e8586e4..7e506b368f8 100644
--- a/src/gui/processing/qgsprocessingwidgetwrapperimpl.h
+++ b/src/gui/processing/qgsprocessingwidgetwrapperimpl.h
@@ -118,6 +118,24 @@ class GUI_EXPORT QgsProcessingBooleanWidgetWrapper : public QgsAbstractProcessin
     friend class TestProcessingGui;
 };
 
+
+
+class GUI_EXPORT QgsProcessingCrsParameterDefinitionWidget : public QgsProcessingAbstractParameterDefinitionWidget
+{
+    Q_OBJECT
+  public:
+
+    QgsProcessingCrsParameterDefinitionWidget( QgsProcessingContext &context,
+        const QgsProcessingParameterWidgetContext &widgetContext,
+        const QgsProcessingParameterDefinition *definition = nullptr,
+        const QgsProcessingAlgorithm *algorithm = nullptr, QWidget *parent SIP_TRANSFERTHIS = nullptr );
+    QgsProcessingParameterDefinition *createParameter( const QString &name, const QString &description, QgsProcessingParameterDefinition::Flags flags ) const override;
+
+  private:
+
+    QgsProjectionSelectionWidget *mCrsSelector = nullptr;
+};
+
 class GUI_EXPORT QgsProcessingCrsWidgetWrapper : public QgsAbstractProcessingParameterWidgetWrapper, public QgsProcessingParameterWidgetFactoryInterface
 {
     Q_OBJECT
@@ -130,6 +148,11 @@ class GUI_EXPORT QgsProcessingCrsWidgetWrapper : public QgsAbstractProcessingPar
     // QgsProcessingParameterWidgetFactoryInterface
     QString parameterType() const override;
     QgsAbstractProcessingParameterWidgetWrapper *createWidgetWrapper( const QgsProcessingParameterDefinition *parameter, QgsProcessingGui::WidgetType type ) override;
+    QgsProcessingAbstractParameterDefinitionWidget *createParameterDefinitionWidget(
+      QgsProcessingContext &context,
+      const QgsProcessingParameterWidgetContext &widgetContext,
+      const QgsProcessingParameterDefinition *definition = nullptr,
+      const QgsProcessingAlgorithm *algorithm = nullptr ) override;
 
     // QgsProcessingParameterWidgetWrapper interface
     QWidget *createWidget() override SIP_FACTORY;