diff --git a/nixos/modules/services/x11/xserver.nix b/nixos/modules/services/x11/xserver.nix
index f04ad6e393ed..d04d02660528 100644
--- a/nixos/modules/services/x11/xserver.nix
+++ b/nixos/modules/services/x11/xserver.nix
@@ -832,7 +832,7 @@ in
     # FIXME: somehow check for unknown driver names.
     services.xserver.drivers = flip concatMap cfg.videoDrivers (
       name:
-      lib.optional (videoDrivers ? name) (
+      lib.optional (videoDrivers ? ${name}) (
         {
           inherit name;
           modules = [ ];