diff --git a/racket-webview-qt.rkt b/racket-webview-qt.rkt
index 71fdf7a..ccb46bc 100644
--- a/racket-webview-qt.rkt
+++ b/racket-webview-qt.rkt
@@ -851,7 +851,9 @@
                      #f
                      (cadr args))))
         )
-    (rkt-webview-finalizer rkt-wv-store cl-w msg)))
+    (rkt-webview-finalizer rkt-wv-store cl-w msg)
+    (unregister-custodian-shutdown rkt-wv-store custodian-finalizer)
+    ))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Cleanup on exit