diff --git a/include/grgsm/qa_utils/message_sink.h b/include/grgsm/qa_utils/message_sink.h
index 5cfe2f7..14369b0 100644
--- a/include/grgsm/qa_utils/message_sink.h
+++ b/include/grgsm/qa_utils/message_sink.h
@@ -35,7 +35,7 @@
      * \ingroup gsm
      *
      */
-    class GSM_API message_sink : virtual public gr::block
+    class GRGSM_API message_sink : virtual public gr::block
     {
      public:
       typedef boost::shared_ptr<message_sink> sptr;