diff --git a/pkgs/servers/sql/postgresql/generic.nix b/pkgs/servers/sql/postgresql/generic.nix
index 40c5ff660ce..b7b2e3014ce 100644
--- a/pkgs/servers/sql/postgresql/generic.nix
+++ b/pkgs/servers/sql/postgresql/generic.nix
@@ -93,6 +93,7 @@ stdenv.mkDerivation rec {
   };
 
   passthru = {
-    inherit readline psqlSchema;
+    inherit psqlSchema;
+    readline = optReadline;
   };
 }