diff --git a/src/core/qgsfieldproxymodel.cpp b/src/core/qgsfieldproxymodel.cpp
index 601713c2b34..52dd5309a12 100644
--- a/src/core/qgsfieldproxymodel.cpp
+++ b/src/core/qgsfieldproxymodel.cpp
@@ -85,6 +85,7 @@ bool QgsFieldProxyModel::filterAcceptsRow( int source_row, const QModelIndex &so
        ( mFilters.testFlag( Double ) && type == QVariant::Double ) ||
        ( mFilters.testFlag( Date ) && type == QVariant::Date ) ||
        ( mFilters.testFlag( Date ) && type == QVariant::DateTime ) ||
+       ( mFilters.testFlag( DateTime ) && type == QVariant::DateTime ) ||
        ( mFilters.testFlag( Time ) && type == QVariant::Time ) )
     return true;
 
diff --git a/src/core/qgsfieldproxymodel.h b/src/core/qgsfieldproxymodel.h
index acddf1ae0e5..4ef45890293 100644
--- a/src/core/qgsfieldproxymodel.h
+++ b/src/core/qgsfieldproxymodel.h
@@ -46,6 +46,7 @@ class CORE_EXPORT QgsFieldProxyModel : public QSortFilterProxyModel
       Date = 16, //!< Date or datetime fields
       Time = 32, //!< Time fields
       HideReadOnly = 64,  //!< Hide read-only fields
+      DateTime = 128, //!< Datetime fieldss
       AllTypes = Numeric | Date | String | Time, //!< All field types
     };
     Q_DECLARE_FLAGS( Filters, Filter )
diff --git a/tests/src/gui/testqgsfieldexpressionwidget.cpp b/tests/src/gui/testqgsfieldexpressionwidget.cpp
index ec8c6dec3f8..82bdfa938da 100644
--- a/tests/src/gui/testqgsfieldexpressionwidget.cpp
+++ b/tests/src/gui/testqgsfieldexpressionwidget.cpp
@@ -306,6 +306,10 @@ void TestQgsFieldExpressionWidget::testFilters()
   QCOMPARE( widget->mCombo->count(), 1 );
   QCOMPARE( widget->mCombo->itemText( 0 ), QStringLiteral( "timefld" ) );
 
+  widget->setFilters( QgsFieldProxyModel::DateTime );
+  QCOMPARE( widget->mCombo->count(), 1 );
+  QCOMPARE( widget->mCombo->itemText( 0 ), QStringLiteral( "datetimefld" ) );
+
   QgsProject::instance()->removeMapLayer( layer );
 }