diff --git a/pkgs/desktops/mate/mate-themes/default.nix b/pkgs/desktops/mate/mate-themes/default.nix
index c994513273b7..8a444702f638 100644
--- a/pkgs/desktops/mate/mate-themes/default.nix
+++ b/pkgs/desktops/mate/mate-themes/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "A set of themes from MATE";
-    homepage = https://mate-desktop.org;
+    homepage = "https://mate-desktop.org";
     license = stdenv.lib.licenses.lgpl21;
     platforms = stdenv.lib.platforms.unix;
     maintainers = [ stdenv.lib.maintainers.romildo ];