diff --git a/libsrc/meshing/topology.hpp b/libsrc/meshing/topology.hpp
index ec8525a8..fd28e857 100644
--- a/libsrc/meshing/topology.hpp
+++ b/libsrc/meshing/topology.hpp
@@ -51,8 +51,8 @@ public:
 
   MeshTopology () = default;
   MeshTopology (MeshTopology && top) = default;
-  MeshTopology (const Mesh & amesh);
-  ~MeshTopology ();
+  DLL_HEADER MeshTopology (const Mesh & amesh);
+  DLL_HEADER ~MeshTopology ();
   MeshTopology & operator= (MeshTopology && top) = default;
 
   void SetBuildVertex2Element (bool bv2e) { buildvertex2element = bv2e; }