diff --git a/nixos/modules/services/security/clamav.nix b/nixos/modules/services/security/clamav.nix
index b045e140546..f71f30fee97 100644
--- a/nixos/modules/services/security/clamav.nix
+++ b/nixos/modules/services/security/clamav.nix
@@ -81,6 +81,7 @@ in
     users.extraUsers = singleton {
       name = clamavUser;
       uid = config.ids.uids.clamav;
+      group = clamavGroup;
       description = "ClamAV daemon user";
       home = stateDir;
     };