diff --git a/package.nix b/package.nix
index b3264e5..d66c926 100644
--- a/package.nix
+++ b/package.nix
@@ -172,6 +172,9 @@ in stdenv.mkDerivation rec {
 
     # This is so Faust can build with LLVM > 18.
     cp ${./faust_llvm_21.patch} bin/packages/faust_llvm_21.patch
+
+    # Fixes the desktop entry so it works nicely on GNOME.
+    printf "StartupWMClass=radium" >> bin/radium.desktop
   '';
 
   configurePhase = ":";