diff --git a/include/osg/Primitive b/include/osg/Primitive
index 69d327247..082f1ecd0 100644
--- a/include/osg/Primitive
+++ b/include/osg/Primitive
@@ -183,7 +183,7 @@ class SG_EXPORT UShortDrawElements : public Primitive, public std::vector<unsign
         virtual void applyPrimitiveOperation(Drawable::PrimitiveFunctor& functor);
 };
 
-class UIntDrawElements : public Primitive, public std::vector<unsigned int>
+class SG_EXPORT UIntDrawElements : public Primitive, public std::vector<unsigned int>
 {
     public: