diff --git a/nixos/modules/virtualisation/qemu-vm.nix b/nixos/modules/virtualisation/qemu-vm.nix
index 191d7c758c0..068d448c933 100644
--- a/nixos/modules/virtualisation/qemu-vm.nix
+++ b/nixos/modules/virtualisation/qemu-vm.nix
@@ -751,7 +751,7 @@ in
         (isYes "NET_CORE")
         (isYes "INET")
         (isYes "NETWORK_FILESYSTEMS")
-      ] ++ optional (!cfg.graphics) [
+      ] ++ optionals (!cfg.graphics) [
         (isYes "SERIAL_8250_CONSOLE")
         (isYes "SERIAL_8250")
       ];