diff --git a/src/app/qgsattributetabledialog.cpp b/src/app/qgsattributetabledialog.cpp
index 9071de14516..e57a6676577 100644
--- a/src/app/qgsattributetabledialog.cpp
+++ b/src/app/qgsattributetabledialog.cpp
@@ -349,13 +349,13 @@ void QgsAttributeTableDialog::updateFieldFromExpression()
 {
   bool filtered = mMainView->filterMode() != QgsAttributeTableFilterModel::ShowAll;
   QgsFeatureIds filteredIds = filtered ? mMainView->filteredFeatures() : QgsFeatureIds();
-  runFieldCalculation( mLayer, mFieldCombo->currentText(), mUpdateExpressionText->currentField(), filteredIds );
+  runFieldCalculation( mLayer, mFieldCombo->currentText(), mUpdateExpressionText->asExpression(), filteredIds );
 }
 
 void QgsAttributeTableDialog::updateFieldFromExpressionSelected()
 {
   QgsFeatureIds filteredIds = mLayer->selectedFeaturesIds();
-  runFieldCalculation( mLayer, mFieldCombo->currentText(), mUpdateExpressionText->currentField(), filteredIds );
+  runFieldCalculation( mLayer, mFieldCombo->currentText(), mUpdateExpressionText->asExpression(), filteredIds );
 }
 
 void QgsAttributeTableDialog::runFieldCalculation( QgsVectorLayer* layer, const QString& fieldName, const QString& expression, const QgsFeatureIds& filteredIds )