diff --git a/racket-webview.rkt b/racket-webview.rkt
index 1de1308..16d0353 100644
--- a/racket-webview.rkt
+++ b/racket-webview.rkt
@@ -542,7 +542,7 @@
   (-> wv-win? is-wv-menu? number? number? symbol?)
   (let* ((json (wv-menu->json menu))
          (js (string-append "window._web_wire_popup_menu(JSON.parse('"
-                            json "', " (format "~a, ~a" x y)
+                            json "'), " (format "~a, ~a" x y)
                             ");"))
          )
     (webview-run-js wv js)))