diff --git a/modules/programs/ssh.nix b/modules/programs/ssh.nix
index 123ef3c02567..5bbe3a000167 100644
--- a/modules/programs/ssh.nix
+++ b/modules/programs/ssh.nix
@@ -46,11 +46,7 @@ in
             ${optionalString cfg.setXAuthLocation ''
               XAuthLocation ${pkgs.xorg.xauth}/bin/xauth
             ''}
-            ${if cfg.forwardX11 then ''
-              ForwardX11 yes
-            '' else ''
-              ForwardX11 no
-            ''}
+            ForwardX11 ${if cfg.forwardX11 then "yes" else "no"}
           '';
           target = "ssh/ssh_config";
         }