diff --git a/include/osgUtil/GLObjectsVisitor b/include/osgUtil/GLObjectsVisitor
index e3c3cc2b0..6e05e1f55 100644
--- a/include/osgUtil/GLObjectsVisitor
+++ b/include/osgUtil/GLObjectsVisitor
@@ -113,7 +113,7 @@ class OSGUTIL_EXPORT GLObjectsVisitor : public osg::NodeVisitor
 
 };
 
-class GLObjectsOperation : public osg::GraphicsOperation
+class OSGUTIL_EXPORT GLObjectsOperation : public osg::GraphicsOperation
 {
     public: