diff --git a/satty.desktop b/satty.desktop
index c28cd90..94b78c9 100644
--- a/satty.desktop
+++ b/satty.desktop
@@ -11,3 +11,4 @@ Icon=satty
 Categories=Utility;Graphics;
 StartupNotify=true
 MimeType=image/png;image/jpeg;
+StartupWMClass=com.gabm.satty