diff --git a/src/OpenMesh/Core/Mesh/BaseKernel.hh b/src/OpenMesh/Core/Mesh/BaseKernel.hh
index 88e9407d..e1cff0ce 100644
--- a/src/OpenMesh/Core/Mesh/BaseKernel.hh
+++ b/src/OpenMesh/Core/Mesh/BaseKernel.hh
@@ -88,7 +88,7 @@ namespace OpenMesh {
 /// \attention Since the class PolyMeshT derives from a kernel, hence all public
 /// elements of %BaseKernel are usable.
 
-class BaseKernel
+class OPENMESHDLLEXPORT BaseKernel
 {
 public: //-------------------------------------------- constructor / destructor
 
diff --git a/src/OpenMesh/Core/Mesh/PolyConnectivity.hh b/src/OpenMesh/Core/Mesh/PolyConnectivity.hh
index 95f61784..74c7d8a4 100644
--- a/src/OpenMesh/Core/Mesh/PolyConnectivity.hh
+++ b/src/OpenMesh/Core/Mesh/PolyConnectivity.hh
@@ -51,7 +51,7 @@ namespace OpenMesh
 
 /** \brief Connectivity Class for polygonal meshes
 */
-class PolyConnectivity : public ArrayKernel
+class OPENMESHDLLEXPORT PolyConnectivity : public ArrayKernel
 {
 public:
   /// \name Mesh Handles
diff --git a/src/OpenMesh/Core/Mesh/TriConnectivity.hh b/src/OpenMesh/Core/Mesh/TriConnectivity.hh
index 9388460a..bf7ad7e4 100644
--- a/src/OpenMesh/Core/Mesh/TriConnectivity.hh
+++ b/src/OpenMesh/Core/Mesh/TriConnectivity.hh
@@ -48,7 +48,7 @@ namespace OpenMesh {
 
 /** \brief Connectivity Class for Triangle Meshes
 */
-class TriConnectivity : public PolyConnectivity
+class OPENMESHDLLEXPORT TriConnectivity : public PolyConnectivity
 {
 public: