diff --git a/src/js/tabs/cli.js b/src/js/tabs/cli.js
index 46bc14ee3f..e39f005974 100644
--- a/src/js/tabs/cli.js
+++ b/src/js/tabs/cli.js
@@ -6,13 +6,15 @@ import BuildApi from '../BuildApi';
 import { tracking } from '../Analytics';
 import { reinitializeConnection } from "../serial_backend";
 import CONFIGURATOR from "../data_storage";
-import serial from "../serial";
 import CliAutoComplete from "../CliAutoComplete";
 import UI_PHONES from "../phones_ui";
 import { gui_log } from "../gui_log";
 import jBox from "jbox";
 import { checkChromeRuntimeError } from "../utils/common";
 import $ from 'jquery';
+import { serialShim } from "../serial_shim";
+
+const serial =  serialShim();
 
 const cli = {
     lineDelayMs: 15,
@@ -446,7 +448,7 @@ cli.read = function (readInfo) {
         Windows understands (both) CRLF
         Chrome OS currently unknown
     */
-    const data = new Uint8Array(readInfo.data);
+    const data = new Uint8Array(readInfo.data ?? readInfo);
     let validateText = "";
     let sequenceCharsToSkip = 0;
 
diff --git a/src/tabs/presets/CliEngine.js b/src/tabs/presets/CliEngine.js
index 23b77304ff..042c278582 100644
--- a/src/tabs/presets/CliEngine.js
+++ b/src/tabs/presets/CliEngine.js
@@ -1,9 +1,11 @@
 import GUI from "../../js/gui";
 import { i18n } from "../../js/localization";
 import CONFIGURATOR from "../../js/data_storage";
-import serial from "../../js/serial";
 import { reinitializeConnection } from "../../js/serial_backend";
 import { gui_log } from "../../js/gui_log";
+import { serialShim } from "../../js/serial_shim";
+
+const serial = serialShim();
 
 export default class CliEngine
 {
@@ -186,7 +188,7 @@ export default class CliEngine
             Windows understands (both) CRLF
             Chrome OS currently unknown
         */
-        const data = new Uint8Array(readInfo.data);
+        const data = new Uint8Array(readInfo.data ?? readInfo);
         let validateText = "";
         let sequenceCharsToSkip = 0;
         for (const charCode of data) {