diff --git a/desktop/gimp.desktop.in.in b/desktop/gimp.desktop.in.in
index c0a98e9c6c..66f5b355c1 100644
--- a/desktop/gimp.desktop.in.in
+++ b/desktop/gimp.desktop.in.in
@@ -13,3 +13,4 @@ Terminal=false
 Categories=Graphics;2DGraphics;RasterGraphics;GTK;
 StartupNotify=true
 MimeType=@MIME_TYPES@
+StartupWMClass=gimp-@GIMP_APP_VERSION@