diff --git a/modules/services/networking/websockify.nix b/modules/services/networking/websockify.nix
index 5e97d2a65cd..8921fc4f6a7 100644
--- a/modules/services/networking/websockify.nix
+++ b/modules/services/networking/websockify.nix
@@ -21,6 +21,7 @@ let cfg = config.services.networking.websockify; in {
       sslKey = mkOption {
         description = "Path to the SSL key";
         default = cfg.sslCert;
+        defaultText = "config.services.networking.websockify.sslCert";
         type = types.path;
       };