diff --git a/nixos/modules/hardware/video/bumblebee.nix b/nixos/modules/hardware/video/bumblebee.nix
index 3ce97ad31c22..fbf3f20885b5 100644
--- a/nixos/modules/hardware/video/bumblebee.nix
+++ b/nixos/modules/hardware/video/bumblebee.nix
@@ -76,7 +76,7 @@ in
 
   config = mkIf cfg.enable {
     boot.blacklistedKernelModules = [ "nvidia-drm" "nvidia" "nouveau" ];
-    boot.kernelModules = optional useBbswitch [ "bbswitch" ];
+    boot.kernelModules = optional useBbswitch "bbswitch";
     boot.extraModulePackages = optional useBbswitch kernel.bbswitch ++ optional useNvidia kernel.nvidia_x11;
 
     environment.systemPackages = [ bumblebee primus ];