--- a/usr/share/applications/atom-beta.desktop
+++ b/usr/share/applications/atom-beta.desktop
@@ -6,5 +6,6 @@ Exec=/usr/bin/atom-beta %U
 Icon=atom-beta
 Type=Application
 StartupNotify=true
+StartupWMClass=Atom
 Categories=GNOME;GTK;Utility;TextEditor;Development;
 MimeType=text/plain;