diff --git a/nixos/modules/services/networking/supplicant.nix b/nixos/modules/services/networking/supplicant.nix
index 0c459fb1dd0c..31d11548f195 100644
--- a/nixos/modules/services/networking/supplicant.nix
+++ b/nixos/modules/services/networking/supplicant.nix
@@ -82,7 +82,8 @@ in
           configFile = {
   
             path = mkOption {
-              type = types.path;
+              type = types.nullOr types.path;
+              default = null;
               example = literalExample "/etc/wpa_supplicant.conf";
               description = ''
                 External <literal>wpa_supplicant.conf</literal> configuration file.