diff --git a/include/osg/Shape b/include/osg/Shape
index a2ac3aa6b..c3a233861 100644
--- a/include/osg/Shape
+++ b/include/osg/Shape
@@ -392,7 +392,7 @@ class ConvexHull : public TriangleMesh
     	~ConvexHull() {}
 };
 
-class HeightField : public Shape
+class SG_EXPORT HeightField : public Shape
 {
     public: