diff --git a/pkgs/applications/networking/instant-messengers/chatterino2/default.nix b/pkgs/applications/networking/instant-messengers/chatterino2/default.nix
index 6f5255bf1860..e637881d968c 100644
--- a/pkgs/applications/networking/instant-messengers/chatterino2/default.nix
+++ b/pkgs/applications/networking/instant-messengers/chatterino2/default.nix
@@ -15,6 +15,9 @@ mkDerivation rec {
   postInstall = lib.optionalString stdenv.isDarwin ''
     mkdir -p "$out/Applications"
     mv bin/chatterino.app "$out/Applications/"
+  '' + ''
+    mkdir -p $out/share/icons/hicolor/256x256/apps
+    cp $src/resources/icon.png $out/share/icons/hicolor/256x256/apps/chatterino.png
   '';
   meta = with lib; {
     description = "A chat client for Twitch chat";