diff --git a/nixos/modules/services/video/go2rtc/default.nix b/nixos/modules/services/video/go2rtc/default.nix
index 45506d551f1..1151d31b68e 100644
--- a/nixos/modules/services/video/go2rtc/default.nix
+++ b/nixos/modules/services/video/go2rtc/default.nix
@@ -103,6 +103,10 @@ in
       serviceConfig = {
         DynamicUser = true;
         User = "go2rtc";
+        SupplementaryGroups = [
+          # for v4l2 devices
+          "video"
+        ];
         StateDirectory = "go2rtc";
         ExecStart = "${cfg.package}/bin/go2rtc -config ${configFile}";
       };