diff --git a/src/blackcore/afv/audio/receiversampleprovider.h b/src/blackcore/afv/audio/receiversampleprovider.h
index 710e75a55..6378fd43f 100644
--- a/src/blackcore/afv/audio/receiversampleprovider.h
+++ b/src/blackcore/afv/audio/receiversampleprovider.h
@@ -17,6 +17,7 @@
 
 #include "blackmisc/aviation/callsignset.h"
 #include "blackmisc/audio/audiosettings.h"
+
 #include <QtGlobal>
 
 namespace BlackCore
@@ -100,4 +101,6 @@ namespace BlackCore
     } // ns
 } // ns
 
+Q_DECLARE_METATYPE(BlackCore::Afv::Audio::TransceiverReceivingCallsignsChangedArgs)
+
 #endif // guard