diff --git a/dom/bindings/BindingUtils.h b/dom/bindings/BindingUtils.h
index cf47fe0afa8f..d10714e5a2c0 100644
--- a/dom/bindings/BindingUtils.h
+++ b/dom/bindings/BindingUtils.h
@@ -1721,7 +1721,9 @@ FindAssociatedGlobal(JSContext* cx, nsIGlobalObject* const& p)
 
   JSObject* global = p->GetGlobalJSObject();
   if (!global) {
-    return nullptr;
+    // nsIGlobalObject doesn't have a JS object anymore,
+    // fallback to the current global.
+    return JS::CurrentGlobalOrNull(cx);
   }
 
   MOZ_ASSERT(JS_IsGlobalObject(global));