diff --git a/include/osgTerrain/DisplacementMappingTechnique b/include/osgTerrain/DisplacementMappingTechnique
index c78f0e6b5..826fd0e5e 100644
--- a/include/osgTerrain/DisplacementMappingTechnique
+++ b/include/osgTerrain/DisplacementMappingTechnique
@@ -23,7 +23,7 @@
 namespace osgTerrain
 {
 
-class DisplacementMappingTechnique : public osgTerrain::TerrainTechnique
+class OSGTERRAIN_EXPORT DisplacementMappingTechnique : public osgTerrain::TerrainTechnique
 {
     public:
 
diff --git a/include/osgTerrain/GeometryPool b/include/osgTerrain/GeometryPool
index ca740fa7c..98f31a3e9 100644
--- a/include/osgTerrain/GeometryPool
+++ b/include/osgTerrain/GeometryPool
@@ -25,7 +25,7 @@
 
 namespace osgTerrain {
 
-extern const osgTerrain::Locator* computeMasterLocator(const osgTerrain::TerrainTile* tile);
+extern OSGTERRAIN_EXPORT const osgTerrain::Locator* computeMasterLocator(const osgTerrain::TerrainTile* tile);
 
 class OSGTERRAIN_EXPORT GeometryPool : public osg::Referenced
 {
@@ -94,7 +94,7 @@ class OSGTERRAIN_EXPORT GeometryPool : public osg::Referenced
 };
 
 
-class HeightFieldDrawable : public osg::Drawable
+class OSGTERRAIN_EXPORT HeightFieldDrawable : public osg::Drawable
 {
     public:
         HeightFieldDrawable();