diff --git a/src/Mod/Part/Gui/SectionCutting.cpp b/src/Mod/Part/Gui/SectionCutting.cpp
index 73b4382b8e..fb2325976a 100644
--- a/src/Mod/Part/Gui/SectionCutting.cpp
+++ b/src/Mod/Part/Gui/SectionCutting.cpp
@@ -25,14 +25,15 @@
 #ifndef _PreComp_
 # include <Inventor/actions/SoGetBoundingBoxAction.h>
 # include <Inventor/nodes/SoCamera.h>
-# include <Inventor/nodes/SoClipPlane.h>
-# include <Inventor/nodes/SoGroup.h>
+//# include <Inventor/nodes/SoClipPlane.h>
+//# include <Inventor/nodes/SoGroup.h>
 # include <Inventor/nodes/SoOrthographicCamera.h>
-# include <Inventor/sensors/SoTimerSensor.h>
+//# include <Inventor/sensors/SoTimerSensor.h>
 # include <QDialog>
 # include <QDockWidget>
-# include <QPointer>
-//# include <cmath>
+# include <QDoubleSpinBox>
+//# include <QPointer>
+# include <QSlider>
 #endif
 
 #include "SectionCutting.h"