diff --git a/nixos/modules/hardware/video/nvidia.nix b/nixos/modules/hardware/video/nvidia.nix
index efc65a55af70..8f1e2671ece0 100644
--- a/nixos/modules/hardware/video/nvidia.nix
+++ b/nixos/modules/hardware/video/nvidia.nix
@@ -101,7 +101,7 @@ in
   config = mkIf enabled {
     assertions = [
       {
-        assertion = !config.services.xserver.displayManager.gdm.wayland;
+        assertion = with config.services.xserver.displayManager; gdm.enable -> !gdm.wayland;
         message = "NVIDIA drivers don't support wayland";
       }
       {