diff --git a/system/configuration.nix b/system/configuration.nix
index 87e4ef1..a86de71 100644
--- a/system/configuration.nix
+++ b/system/configuration.nix
@@ -36,7 +36,7 @@
   # Change the sudo askpass program
   security.sudo.extraConfig = ''
     Plugin askpass /nix/store/5x5y8amldf8p1llwsv60jalmfy51aq51-ssh-askpass-fullscreen-1.2/bin/ssh-askpass-fullscreen
-  ''
+  '';
 
   # Set your time zone.
   time.timeZone = "Europe/London";