--- /dev/null
+diff --git a/src/Standard/Standard_ErrorHandler.hxx b/src/Standard/Standard_ErrorHandler.hxx
+index 09bdc7bfbf..726951fb89 100644
+--- a/src/Standard/Standard_ErrorHandler.hxx
++++ b/src/Standard/Standard_ErrorHandler.hxx
+@@ -155,13 +155,13 @@ public:
+ DEFINE_STANDARD_ALLOC
+
+ //! Registers this callback object in the current error handler (if found).
+- void RegisterCallback();
++ Standard_EXPORT void RegisterCallback();
+
+ //! Unregisters this callback object from the error handler.
+- void UnregisterCallback();
++ Standard_EXPORT void UnregisterCallback();
+
+ //! Destructor
+- virtual ~Callback();
++ Standard_EXPORT virtual ~Callback();
+
+ //! The callback function to perform necessary callback action.
+ //! Called by the exception handler when it is being destroyed but