diff --git a/include/osgShadow/DebugShadowMap b/include/osgShadow/DebugShadowMap
index 8492683ac..e8fa9f7fb 100644
--- a/include/osgShadow/DebugShadowMap
+++ b/include/osgShadow/DebugShadowMap
@@ -86,7 +86,7 @@ class OSGSHADOW_EXPORT DebugShadowMap : public ViewDependentShadowTechnique
 
         osg::ref_ptr< osg::Shader > _depthColorFragmentShader;
 
-        struct ViewData: public BaseClass::ViewData
+        struct OSGSHADOW_EXPORT ViewData: public BaseClass::ViewData
         {
             /** 
             Texture used as ShadowMap - initialized by derived classes. 
diff --git a/include/osgShadow/MinimalCullBoundsShadowMap b/include/osgShadow/MinimalCullBoundsShadowMap
index 56ec17aee..262f79e90 100644
--- a/include/osgShadow/MinimalCullBoundsShadowMap
+++ b/include/osgShadow/MinimalCullBoundsShadowMap
@@ -45,7 +45,7 @@ class OSGSHADOW_EXPORT MinimalCullBoundsShadowMap
         /** Classic protected OSG destructor */
         virtual ~MinimalCullBoundsShadowMap(void);
 
-        struct ViewData: public MinimalShadowMap::ViewData
+        struct OSGSHADOW_EXPORT ViewData: public MinimalShadowMap::ViewData
         {
             virtual void init( ThisClass * st, osgUtil::CullVisitor * cv );
 
diff --git a/include/osgShadow/MinimalDrawBoundsShadowMap b/include/osgShadow/MinimalDrawBoundsShadowMap
index fadbdeeb8..3ff7cfee1 100644
--- a/include/osgShadow/MinimalDrawBoundsShadowMap
+++ b/include/osgShadow/MinimalDrawBoundsShadowMap
@@ -46,7 +46,7 @@ class OSGSHADOW_EXPORT MinimalDrawBoundsShadowMap
         /** Classic protected OSG destructor */
         virtual ~MinimalDrawBoundsShadowMap(void);
 
-        struct ViewData: public BaseClass::ViewData
+        struct OSGSHADOW_EXPORT ViewData: public BaseClass::ViewData
         {
             osg::ref_ptr< osg::RefMatrix >       _projection;
             osg::Vec2s                           _boundAnalysisSize;
diff --git a/include/osgShadow/MinimalShadowMap b/include/osgShadow/MinimalShadowMap
index d5384ec97..810a3cf83 100644
--- a/include/osgShadow/MinimalShadowMap
+++ b/include/osgShadow/MinimalShadowMap
@@ -97,7 +97,7 @@ class OSGSHADOW_EXPORT MinimalShadowMap : public StandardShadowMap
         float                              _minLightMargin; 
         ShadowReceivingCoarseBoundAccuracy _shadowReceivingCoarseBoundAccuracy;
 
-        struct ViewData: public BaseClass::ViewData
+        struct OSGSHADOW_EXPORT ViewData: public BaseClass::ViewData
         {
             osg::Matrix                      *_modellingSpaceToWorldPtr;
             float                            *_maxFarPlanePtr;
diff --git a/include/osgShadow/ProjectionShadowMap b/include/osgShadow/ProjectionShadowMap
index 94b6207d2..4ca928195 100644
--- a/include/osgShadow/ProjectionShadowMap
+++ b/include/osgShadow/ProjectionShadowMap
@@ -52,7 +52,7 @@ class OSGSHADOW_EXPORT ProjectionShadowMap : public MinimalBoundsBaseClass
         {
         }
 
-        struct ViewData: public BaseClass::ViewData, 
+        struct OSGSHADOW_EXPORT ViewData: public BaseClass::ViewData, 
                          public ShadowProjectionAlgorithmClass
         {    
     #if 0
diff --git a/include/osgShadow/StandardShadowMap b/include/osgShadow/StandardShadowMap
index d451a7537..f2fbd1daa 100644
--- a/include/osgShadow/StandardShadowMap
+++ b/include/osgShadow/StandardShadowMap
@@ -145,7 +145,7 @@ class OSGSHADOW_EXPORT StandardShadowMap : public DebugShadowMap
         unsigned int                  _baseTextureCoordIndex;
         unsigned int                  _shadowTextureCoordIndex;
 
-        struct ViewData: public BaseClass::ViewData
+        struct OSGSHADOW_EXPORT ViewData: public BaseClass::ViewData
         {
             osg::ref_ptr< osg::Light > *  _lightPtr;
             unsigned int               *  _baseTextureUnitPtr;
diff --git a/include/osgShadow/ViewDependentShadowTechnique b/include/osgShadow/ViewDependentShadowTechnique
index d3890f6ed..168374cdb 100644
--- a/include/osgShadow/ViewDependentShadowTechnique
+++ b/include/osgShadow/ViewDependentShadowTechnique
@@ -148,7 +148,7 @@ class OSGSHADOW_EXPORT ViewDependentShadowTechnique
         Techniques based on ViewDependentShadowTechnique will usually define
         similar struct and derive it from ViewData to contain their specufic resources.
         */
-        struct ViewData: public osg::Referenced
+        struct OSGSHADOW_EXPORT ViewData: public osg::Referenced
         {
             /**
             Method called upon ViewData instance to initialize internal variables