diff --git a/modules/base/src/message.hh b/modules/base/src/message.hh
index d1b8a148c0e61077e93ddcdb4332536d04336ea2..6b51a9891709800d0ff749ada92239e5c4d2a46b 100644
--- a/modules/base/src/message.hh
+++ b/modules/base/src/message.hh
@@ -31,7 +31,7 @@
 
 namespace ost {
 
-struct DLLEXPORT_OST_BASE Message: public std::exception {
+struct DLLEXPORT Message: public std::exception {
   Message(const String& mesg,const String& prefix="");
   virtual ~Message() throw();
   // exception interface
@@ -41,7 +41,7 @@ struct DLLEXPORT_OST_BASE Message: public std::exception {
   String _mesg;
 };
 
-struct DLLEXPORT_OST_BASE Error: public Message {
+struct DLLEXPORT Error: public Message {
   Error(const String& m);
 };