diff --git a/src/Gui/View3DInventor.cpp b/src/Gui/View3DInventor.cpp
index 5b3ed1d8e6..4333d2c370 100644
--- a/src/Gui/View3DInventor.cpp
+++ b/src/Gui/View3DInventor.cpp
@@ -32,6 +32,7 @@
 # include <QDropEvent>
 # include <QDragEnterEvent>
 # include <QFileDialog>
+# include <QLayout>
 # include <QMdiSubWindow>
 # include <QMessageBox>
 # include <QPainter>