diff --git a/src/Gui/Inventor/SoToggleSwitch.h b/src/Gui/Inventor/SoToggleSwitch.h
index 11c9c90dd6..fe6033c98d 100644
--- a/src/Gui/Inventor/SoToggleSwitch.h
+++ b/src/Gui/Inventor/SoToggleSwitch.h
@@ -31,7 +31,7 @@
 /**
  * A switch that can be used to show or hide all child nodes
  */
-class SoToggleSwitch: public SoSwitch
+class GuiExport SoToggleSwitch: public SoSwitch
 {
     SO_NODE_HEADER(SoToggleSwitch);