diff --git a/api/user_auth.go b/api/user_auth.go
index 0bfb4fd..94ba2e6 100644
--- a/api/user_auth.go
+++ b/api/user_auth.go
@@ -26,12 +26,11 @@ var ClientTime = KeyWrapper("__context_client_time")
 func AuthMiddleware(log *zap.Logger, center auth.Center) mux.MiddlewareFunc {
 	return func(h http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			var ctx context.Context
+			ctx := r.Context()
 			box, err := center.Authenticate(r)
 			if err != nil {
 				if err == auth.ErrNoAuthorizationHeader {
 					reqLogOrDefault(ctx, log).Debug("couldn't receive access box for gate key, random key will be used")
-					ctx = r.Context()
 				} else {
 					reqLogOrDefault(ctx, log).Error("failed to pass authentication", zap.Error(err))
 					if _, ok := err.(errors.Error); !ok {
@@ -41,7 +40,7 @@ func AuthMiddleware(log *zap.Logger, center auth.Center) mux.MiddlewareFunc {
 					return
 				}
 			} else {
-				ctx = context.WithValue(r.Context(), BoxData, box.AccessBox)
+				ctx = context.WithValue(ctx, BoxData, box.AccessBox)
 				if !box.ClientTime.IsZero() {
 					ctx = context.WithValue(ctx, ClientTime, box.ClientTime)
 				}