diff --git a/src/Mod/PartDesign/Gui/TaskDressUpParameters.cpp b/src/Mod/PartDesign/Gui/TaskDressUpParameters.cpp
index 4aa7a188aa..55286e000d 100644
--- a/src/Mod/PartDesign/Gui/TaskDressUpParameters.cpp
+++ b/src/Mod/PartDesign/Gui/TaskDressUpParameters.cpp
@@ -231,7 +231,7 @@ void TaskDressUpParameters::doubleClicked(QListWidgetItem* item) {
     Gui::Selection().clearSelection();
 
     // enable next possible single-click event after double-click time passed
-    QTimer::singleShot(QApplication::doubleClickInterval(), this, SLOT(itemClickedTimeout()));
+    QTimer::singleShot(QApplication::doubleClickInterval(), this, &TaskDressUpParameters::itemClickedTimeout);
 }
 
 void TaskDressUpParameters::setSelection(QListWidgetItem* current) {
@@ -240,7 +240,7 @@ void TaskDressUpParameters::setSelection(QListWidgetItem* current) {
 
     if (!wasDoubleClicked) {
         // we treat it as single-click event once the QApplication double-click time is passed
-        QTimer::singleShot(QApplication::doubleClickInterval(), this, SLOT(itemClickedTimeout()));
+        QTimer::singleShot(QApplication::doubleClickInterval(), this, &TaskDressUpParameters::itemClickedTimeout);
 
         // name of the item
         std::string subName = current->text().toStdString();
diff --git a/src/Mod/PartDesign/Gui/TaskFeaturePick.cpp b/src/Mod/PartDesign/Gui/TaskFeaturePick.cpp
index 3dfaf11457..ea09e4a620 100644
--- a/src/Mod/PartDesign/Gui/TaskFeaturePick.cpp
+++ b/src/Mod/PartDesign/Gui/TaskFeaturePick.cpp
@@ -509,14 +509,14 @@ void TaskFeaturePick::slotDeletedObject(const Gui::ViewProviderDocumentObject& O
 void TaskFeaturePick::slotUndoDocument(const Gui::Document&)
 {
     if (origins.empty()) {
-        QTimer::singleShot(100, &Gui::Control(), SLOT(closeDialog()));
+        QTimer::singleShot(100, &Gui::Control(), &Gui::ControlSingleton::closeDialog);
     }
 }
 
 void TaskFeaturePick::slotDeleteDocument(const Gui::Document&)
 {
     origins.clear();
-    QTimer::singleShot(100, &Gui::Control(), SLOT(closeDialog()));
+    QTimer::singleShot(100, &Gui::Control(), &Gui::ControlSingleton::closeDialog);
 }
 
 void TaskFeaturePick::showExternal(bool val)