diff --git a/include/osgAnimation/Skeleton b/include/osgAnimation/Skeleton
index 529ff4f3c..b1e69b1a5 100644
--- a/include/osgAnimation/Skeleton
+++ b/include/osgAnimation/Skeleton
@@ -27,7 +27,7 @@ namespace osgAnimation
     public:
         META_Node(osgAnimation, Skeleton);
 
-        struct UpdateSkeleton : public osg::NodeCallback
+        struct OSGANIMATION_EXPORT UpdateSkeleton : public osg::NodeCallback
         {
             META_Object(osgAnimation, UpdateSkeleton);
             UpdateSkeleton() {}