diff --git a/packages/webview_flutter/webview_flutter_wkwebview/darwin/webview_flutter_wkwebview/Sources/webview_flutter_wkwebview/WebKitLibrary.g.swift b/packages/webview_flutter/webview_flutter_wkwebview/darwin/webview_flutter_wkwebview/Sources/webview_flutter_wkwebview/WebKitLibrary.g.swift
index c2f66df0a4b..d5b84cf9d31 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/darwin/webview_flutter_wkwebview/Sources/webview_flutter_wkwebview/WebKitLibrary.g.swift
+++ b/packages/webview_flutter/webview_flutter_wkwebview/darwin/webview_flutter_wkwebview/Sources/webview_flutter_wkwebview/WebKitLibrary.g.swift
@@ -4344,7 +4344,7 @@ final class PigeonApiWKNavigationDelegate: PigeonApiProtocolWKNavigationDelegate
         let message: String? = nilOrValue(listResponse[1])
         let details: String? = nilOrValue(listResponse[2])
         completion(.failure(PigeonError(code: code, message: message, details: details)))
-      } else if listResponse[0] == nil {
+      } else if listResponse[0] == nil || firstElement is NSNull {
         completion(
           .failure(
             PigeonError(