diff --git a/src/Gui/Application.cpp b/src/Gui/Application.cpp
index ef790c90e..2e61b27a6 100644
--- a/src/Gui/Application.cpp
+++ b/src/Gui/Application.cpp
@@ -1169,11 +1169,10 @@ QPixmap Application::workbenchIcon(const QString& wb) const
     QIcon icon = QApplication::windowIcon();
     if (!icon.isNull()) {
         QList<QSize> s = icon.availableSizes();
-        return icon.pixmap(s[0]);
-    }
-    else {
-        return QPixmap();
+        if (!s.isEmpty())
+            return icon.pixmap(s[0]);
     }
+    return QPixmap();
 }
 
 QString Application::workbenchToolTip(const QString& wb) const