diff --git a/src/Mod/Sandbox/Gui/GLGraphicsView.cpp b/src/Mod/Sandbox/Gui/GLGraphicsView.cpp
index a0136ee71fd4..afd4e560db06 100644
--- a/src/Mod/Sandbox/Gui/GLGraphicsView.cpp
+++ b/src/Mod/Sandbox/Gui/GLGraphicsView.cpp
@@ -66,10 +66,6 @@
 
 using namespace Gui;
 
-#ifndef GL_MULTISAMPLE
-#define GL_MULTISAMPLE  0x809D
-#endif
-
 // http://doc.qt.digia.com/qq/qq26-openglcanvas.html
 
 GraphicsView::GraphicsView()
diff --git a/src/Mod/Sandbox/Gui/Overlay.cpp b/src/Mod/Sandbox/Gui/Overlay.cpp
index d50db9df6d66..b8df855acd23 100644
--- a/src/Mod/Sandbox/Gui/Overlay.cpp
+++ b/src/Mod/Sandbox/Gui/Overlay.cpp
@@ -69,9 +69,6 @@ class MyPaintable : public Gui::GLGraphicsItem
 
         view->getSoRenderManager()->scheduleRedraw();
     }
- #ifndef GL_MULTISAMPLE
- #define GL_MULTISAMPLE  0x809D
- #endif
     void paintGL()
     {
     const SbViewportRegion vp = view->getSoRenderManager()->getViewportRegion();