diff --git a/modules/services/databases/postgresql.nix b/modules/services/databases/postgresql.nix
index a33fdaab423..61f69dfd34a 100644
--- a/modules/services/databases/postgresql.nix
+++ b/modules/services/databases/postgresql.nix
@@ -53,7 +53,7 @@ in
       };
 
       package = mkOption {
-        default = pkgs.postgresql;
+        example = literalExample "pkgs.postgresql92";
         description = ''
           PostgreSQL package to use.
         '';