diff --git a/nixos/modules/services/display-managers/sddm.nix b/nixos/modules/services/display-managers/sddm.nix
index d5ba80d009b7..af7600ec5f66 100644
--- a/nixos/modules/services/display-managers/sddm.nix
+++ b/nixos/modules/services/display-managers/sddm.nix
@@ -257,6 +257,7 @@ in
       theme = mkOption {
         type = types.str;
         default = "";
+        example = lib.literalExpression "\"\${pkgs.where-is-my-sddm-theme.override { variants = [ \"qt5\" ]; }}/share/sddm/themes/where_is_my_sddm_theme_qt5\"";
         description = ''
           Greeter theme to use.
         '';