diff --git a/include/osg/MatrixTransform b/include/osg/MatrixTransform
index 0764ad856..47498c6dd 100644
--- a/include/osg/MatrixTransform
+++ b/include/osg/MatrixTransform
@@ -81,7 +81,7 @@ class SG_EXPORT MatrixTransform : public Transform
 
         /** Callback which can be attached to a MatrixTransform as an app 
           * callback to allow it to follow the path defined by a AnimationPath.*/
-        class AnimationPathCallback : public NodeCallback
+        class SG_EXPORT AnimationPathCallback : public NodeCallback
         {
             public:
             
diff --git a/include/osg/PositionAttitudeTransform b/include/osg/PositionAttitudeTransform
index 53725d595..439fd7da7 100644
--- a/include/osg/PositionAttitudeTransform
+++ b/include/osg/PositionAttitudeTransform
@@ -53,7 +53,7 @@ class SG_EXPORT PositionAttitudeTransform : public Transform
         /** Callback which can be attached to a PositionAttitudeTransform
           * as an app callback to allow it to follow the path defined by a
           * AnimationPath.*/
-        class AnimationPathCallback : public NodeCallback
+        class SG_EXPORT AnimationPathCallback : public NodeCallback
         {
             public: