diff --git a/sources/projectview.cpp b/sources/projectview.cpp
index d9a9330d1..84afbab7c 100644
--- a/sources/projectview.cpp
+++ b/sources/projectview.cpp
@@ -810,7 +810,7 @@ void ProjectView::initWidgets() {
 	fallback_label_ -> setAlignment(Qt::AlignVCenter | Qt::AlignHCenter);
 
 	// initialize tabs
-	m_tab = new QTabWidget(this);
+	m_tab = new WheelEnabledTabBar(this); //-----
 	m_tab -> setMovable(true);
 
 	QToolButton *add_new_diagram_button = new QToolButton;
diff --git a/sources/projectview.h b/sources/projectview.h
index f1becd5ba..bd4591eff 100644
--- a/sources/projectview.h
+++ b/sources/projectview.h
@@ -19,10 +19,35 @@
 #define PROJECT_VIEW_H
 
 #include <QWidget>
+#include <QtWidgets>
+#include <QTabBar>
 
 #include "templatelocation.h"
 #include "qetresult.h"
 
+
+
+//class WheelEnabledTabBar : public QTabBar
+class WheelEnabledTabBar : public QTabWidget
+{
+public:
+    WheelEnabledTabBar(QWidget *parent = nullptr)
+//       : QTabBar(parent)
+       : QTabWidget(parent)
+    {}
+
+    void wheelEvent(QWheelEvent *event) override
+    {
+        int index = currentIndex();
+        if (index != -1) {
+            index += event->delta() > 0 ? -1 : 1;
+            if (index >= 0 && index < count())
+                setCurrentIndex(index);
+        }
+    }
+};
+
+
 class QETProject;
 class DiagramView;
 class Diagram;
@@ -31,6 +56,7 @@ class QTabWidget;
 class QLabel;
 class QVBoxLayout;
 
+
 /**
 	This class provides a widget displaying the diagrams of a particular
 	project using tabs.
@@ -131,10 +157,12 @@ class ProjectView : public QWidget
 		QVBoxLayout *layout_;
 		QWidget *fallback_widget_;
 		QLabel *fallback_label_;
-		QTabWidget *m_tab;
+		//QTabWidget *m_tab;
+		WheelEnabledTabBar *m_tab; 
 		QMap<int, DiagramView *> m_diagram_ids;
 		int m_previous_tab_index = -1;
 		QList<DiagramView *> m_diagram_view_list;
 };
 
+
 #endif