diff -ur freeciv-2.6.0/bootstrap/freeciv-gtk3.appdata.xml.in freeciv-2.6.0_fix/bootstrap/freeciv-gtk3.appdata.xml.in
--- freeciv-2.6.0/bootstrap/freeciv-gtk3.appdata.xml.in	2018-07-21 23:42:11.000000000 +0200
+++ freeciv-2.6.0_fix/bootstrap/freeciv-gtk3.appdata.xml.in	2019-07-10 18:45:57.393807989 +0200
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <component>
     <name>Freeciv gtk+-3 client</name>
-    <id type="desktop">freeciv.desktop</id>
+    <id type="desktop">freeciv-gtk3.desktop</id>
     <metadata_license>CC0</metadata_license>
     <summary>Gtk+-3 based client for the Freeciv game</summary>
     <description>
Nur in freeciv-2.6.0_fix/bootstrap: freeciv-gtk3.appdata.xml.in~.