diff --git a/pkgs/applications/graphics/mcomix3/default.nix b/pkgs/applications/graphics/mcomix3/default.nix
index db777b3bd77d..30a056738975 100644
--- a/pkgs/applications/graphics/mcomix3/default.nix
+++ b/pkgs/applications/graphics/mcomix3/default.nix
@@ -47,7 +47,8 @@ python3.pkgs.buildPythonApplication rec {
     runHook preInstall
 
     substituteInPlace mime/*.desktop \
-      --replace "Exec=mcomix" "Exec=mcomix3"
+      --replace "Exec=mcomix" "Exec=mcomix3" \
+      --replace "Icon=mcomix" "Icon=${pname}"
     ${python3.executable} installer.py --srcdir=mcomix --target=$libdir
     mv $libdir/mcomix/mcomixstarter.py $out/bin/${pname}
     mv $libdir/mcomix/comicthumb.py $out/bin/comicthumb