diff --git a/sources/autoNum/ui/autonumberingdockwidget.h b/sources/autoNum/ui/autonumberingdockwidget.h
index 5e86610e1..8472439bf 100644
--- a/sources/autoNum/ui/autonumberingdockwidget.h
+++ b/sources/autoNum/ui/autonumberingdockwidget.h
@@ -72,7 +72,6 @@ class AutoNumberingDockWidget : public QDockWidget
 		void on_m_folio_increase_sb_valueChanged(int);
 
 	signals:
-		void folioAutoNumChanged(QString);
 
 	private:
 		enum class AutoNumCategory { Conductor, Element, Folio };
diff --git a/sources/editor/ui/qetelementeditor.cpp b/sources/editor/ui/qetelementeditor.cpp
index 9a4eb2ffb..3febab0d9 100644
--- a/sources/editor/ui/qetelementeditor.cpp
+++ b/sources/editor/ui/qetelementeditor.cpp
@@ -848,7 +848,7 @@ bool QETElementEditor::event(QEvent *event)
 {
 	if (m_first_activation && event->type() == QEvent::WindowActivate) {
 		m_first_activation = false;
-		QTimer::singleShot(250, m_view, SLOT(zoomFit()));
+		QTimer::singleShot(250, m_view, &ElementView::zoomFit);
 	}
 
 	return QMainWindow::event(event);
diff --git a/sources/genericpanel.cpp b/sources/genericpanel.cpp
index dbb856b75..71248faa1 100644
--- a/sources/genericpanel.cpp
+++ b/sources/genericpanel.cpp
@@ -1033,7 +1033,7 @@ bool GenericPanel::event(QEvent *event) {
 	if (first_activation_) {
 		if (event -> type() == QEvent::WindowActivate
 				|| event -> type() == QEvent::Show) {
-			QTimer::singleShot(250, this, SLOT(emitFirstActivated()));
+			QTimer::singleShot(250, this, &GenericPanel::emitFirstActivated);
 			first_activation_ = false;
 		}
 	}
diff --git a/sources/qetdiagrameditor.cpp b/sources/qetdiagrameditor.cpp
index 5f98fe11f..ac5656af8 100644
--- a/sources/qetdiagrameditor.cpp
+++ b/sources/qetdiagrameditor.cpp
@@ -983,7 +983,7 @@ bool QETDiagramEditor::event(QEvent *e)
 	if (m_first_show && e->type() == QEvent::WindowActivate)
 	{
 		m_first_show = false;
-		QTimer::singleShot(250, m_element_collection_widget, SLOT(reload()));
+		QTimer::singleShot(250, m_element_collection_widget, &ElementsCollectionWidget::reload);
 	}
 	return(QETMainWindow::event(e));
 }
diff --git a/sources/titleblock/qettemplateeditor.cpp b/sources/titleblock/qettemplateeditor.cpp
index 8b83c4bb3..9dd025132 100644
--- a/sources/titleblock/qettemplateeditor.cpp
+++ b/sources/titleblock/qettemplateeditor.cpp
@@ -142,7 +142,7 @@ void QETTitleBlockTemplateEditor::firstActivation(QEvent *event)
 	Q_UNUSED(event)
 	if (duplicate_ && !opened_from_file_ && location_.parentCollection()) {
 		// this editor is supposed to duplicate its current location
-		QTimer::singleShot(250, this, SLOT(duplicateCurrentLocation()));
+		QTimer::singleShot(250, this, &QETTitleBlockTemplateEditor::duplicateCurrentLocation);
 	}
 }
 
diff --git a/sources/titleblock/templateview.cpp b/sources/titleblock/templateview.cpp
index c1719b52d..644f3239b 100644
--- a/sources/titleblock/templateview.cpp
+++ b/sources/titleblock/templateview.cpp
@@ -863,7 +863,7 @@ void TitleBlockTemplateView::fillWithEmptyCells()
 */
 bool TitleBlockTemplateView::event(QEvent *event) {
 	if (first_activation_ && event -> type() == QEvent::WindowActivate) {
-		QTimer::singleShot(250, this, SLOT(zoomFit()));
+		QTimer::singleShot(250, this, &TitleBlockTemplateView::zoomFit);
 		first_activation_ = false;
 	}
 	return(QGraphicsView::event(event));
diff --git a/sources/ui/elementinfowidget.cpp b/sources/ui/elementinfowidget.cpp
index a566643c5..0b8a41111 100644
--- a/sources/ui/elementinfowidget.cpp
+++ b/sources/ui/elementinfowidget.cpp
@@ -148,7 +148,7 @@ bool ElementInfoWidget::event(QEvent *event)
 	{
 		if (event -> type() == QEvent::WindowActivate || event -> type() == QEvent::Show)
 		{
-			QTimer::singleShot(250, this, SLOT(firstActivated()));
+			QTimer::singleShot(250, this, &ElementInfoWidget::firstActivated);
 			m_first_activation = false;
 		}
 	}
diff --git a/sources/ui/linksingleelementwidget.cpp b/sources/ui/linksingleelementwidget.cpp
index 08c65cc55..026ca251d 100644
--- a/sources/ui/linksingleelementwidget.cpp
+++ b/sources/ui/linksingleelementwidget.cpp
@@ -528,7 +528,7 @@ void LinkSingleElementWidget::diagramWasRemovedFromProject()
 	// contains the master element linked to the edited element
 	// we must wait for this elements to be unlinked,
 	// or else the list of available master isn't up to date
-	QTimer::singleShot(10, this, SLOT(updateUi()));
+	QTimer::singleShot(10, this, &LinkSingleElementWidget::updateUi);
 }
 
 void LinkSingleElementWidget::showedElementWasDeleted()
diff --git a/sources/ui/masterpropertieswidget.cpp b/sources/ui/masterpropertieswidget.cpp
index 0457fadb6..2924f0549 100644
--- a/sources/ui/masterpropertieswidget.cpp
+++ b/sources/ui/masterpropertieswidget.cpp
@@ -427,7 +427,7 @@ void MasterPropertiesWidget::diagramWasdeletedFromProject()
 	// contains slave element linked to the edited element
 	// we must wait for this elements be unlinked,
 	// or else the linked list provides deleted elements.
-	QTimer::singleShot(10, this, SLOT(updateUi()));
+	QTimer::singleShot(10, this, &MasterPropertiesWidget::updateUi);
 }
 
 /**