diff --git a/modules/misc/ids.nix b/modules/misc/ids.nix
index 922bbb531719..941bd4303a7b 100644
--- a/modules/misc/ids.nix
+++ b/modules/misc/ids.nix
@@ -143,6 +143,7 @@ in
     smtpq = 64;
     supybot = 65;
     iodined = 66;
+    libvirtd = 67;
 
     # When adding a gid, make sure it doesn't match an existing uid.
 
diff --git a/modules/virtualisation/libvirtd.nix b/modules/virtualisation/libvirtd.nix
index 876ce01615ac..98d438cd63a5 100644
--- a/modules/virtualisation/libvirtd.nix
+++ b/modules/virtualisation/libvirtd.nix
@@ -141,7 +141,7 @@ in
         serviceConfig.RemainAfterExit = true;
       };
 
-    users.extraGroups.libvirtd = {};
+    users.extraGroups.libvirtd.gid = config.ids.gids.libvirtd;
 
   };