diff --git a/include/grgsm/misc_utils/message_printer.h b/include/grgsm/misc_utils/message_printer.h
index 04aae94..6755b76 100644
--- a/include/grgsm/misc_utils/message_printer.h
+++ b/include/grgsm/misc_utils/message_printer.h
@@ -35,7 +35,7 @@
      * \ingroup gsm
      *
      */
-    class GSM_API message_printer : virtual public gr::block
+    class GRGSM_API message_printer : virtual public gr::block
     {
      public:
       typedef boost::shared_ptr<message_printer> sptr;