diff --git a/include/grgsm/misc_utils/extract_system_info.h b/include/grgsm/misc_utils/extract_system_info.h
index a05be18..32331b4 100644
--- a/include/grgsm/misc_utils/extract_system_info.h
+++ b/include/grgsm/misc_utils/extract_system_info.h
@@ -36,7 +36,7 @@
      * \ingroup gsm
      *
      */
-    class GSM_API extract_system_info : virtual public gr::block
+    class GRGSM_API extract_system_info : virtual public gr::block
     {
      public:
       typedef boost::shared_ptr<extract_system_info> sptr;