diff --git a/system/services/qemukvm.nix b/system/services/qemukvm.nix
index a33ccb2..f50caa9 100644
--- a/system/services/qemukvm.nix
+++ b/system/services/qemukvm.nix
@@ -28,8 +28,8 @@
 
   # Needed to make NAT work
   networking.firewall.trustedInterfaces = [
-    virbr0
-    virbr1
+    "virbr0"
+    "virbr1"
   ];
 
   # Allow Looking-Glass permissions