Index: trunk/src/org/openstreetmap/josm/actions/AboutAction.java
===================================================================
--- trunk/src/org/openstreetmap/josm/actions/AboutAction.java	(revision 18584)
+++ trunk/src/org/openstreetmap/josm/actions/AboutAction.java	(revision 18585)
@@ -116,4 +116,5 @@
         logos.add(createImageLink("OpenStreetMap", /* ICON(dialogs/about/) */ "openstreetmap",
                 "https://www.openstreetmap.org/user/josmeditor/diary"));
+        logos.add(createImageLink("Mastodon", /* ICON(dialogs/about/) */ "mastodon", "https://en.osm.town/@josmeditor"));
         logos.add(createImageLink("Twitter", /* ICON(dialogs/about/) */ "twitter-square", "https://twitter.com/josmeditor"));
         logos.add(createImageLink("Facebook", /* ICON(dialogs/about/) */ "facebook-square", "https://www.facebook.com/josmeditor"));