diff --git a/include/grgsm/misc_utils/message_printer.h b/include/grgsm/misc_utils/message_printer.h
index 3ed8bbd..b7f3293 100644
--- a/include/grgsm/misc_utils/message_printer.h
+++ b/include/grgsm/misc_utils/message_printer.h
@@ -48,7 +48,7 @@
        * class. gsm::message_printer::make is the public interface for
        * creating new instances.
        */
-      static sptr make();
+      static sptr make(pmt::pmt_t prepend_string);
     };
 
   } // namespace gsm