diff --git a/pkg/appdata.xml b/pkg/appdata.xml
index b3e3638d..aff04694 100644
--- a/pkg/appdata.xml
+++ b/pkg/appdata.xml
@@ -104,5 +104,6 @@
 		<mimetype>application/vnd.twonav.trk</mimetype>
 		<mimetype>application/vnd.twonav.rte</mimetype>
 		<mimetype>application/vnd.twonav.wpt</mimetype>
+		<mimetype>application/vnd.cgtk.gemf</mimetype>
 	</mimetypes>
 </component>