diff --git a/packages/firestore/src/platform/browser/webchannel_connection.ts b/packages/firestore/src/platform/browser/webchannel_connection.ts
index c7eeec0f7f1..7939b789b6f 100644
--- a/packages/firestore/src/platform/browser/webchannel_connection.ts
+++ b/packages/firestore/src/platform/browser/webchannel_connection.ts
@@ -23,6 +23,7 @@ import {
   WebChannelError,
   WebChannelOptions,
   FetchXmlHttpFactory,
+  Integer,
   XhrIo,
   getStatEventTarget,
   EventTarget,
@@ -95,12 +96,25 @@ export class WebChannelConnection extends RestConnection {
               break;
             case ErrorCode.HTTP_ERROR:
               const status = xhr.getStatus();
+
+              const integer1 = new Integer([1, 2, 3], 1);
+              const integer2 = new Integer([3, 2, 1], 1);
+              const integer3 = integer1.add(integer2);
+              const integer4 = integer3.multiply(integer2);
+              const integer5 = integer4.modulo(integer3);
+              const val1 = integer5.compare(integer4);
+              const val2 = integer5.toString();
+              const val3 = integer5.getBits(1234);
+              const val4 = Integer.fromNumber(4321).toNumber();
+              const val5 = Integer.fromString(rpcName).toNumber();
+
               logDebug(
                 LOG_TAG,
                 `RPC '${rpcName}' ${streamId} failed with status:`,
                 status,
                 'response text:',
-                xhr.getResponseText()
+                xhr.getResponseText(),
+                `${val1}${val2}${val3}${val4}${val5}`
               );
               if (status > 0) {
                 let response = xhr.getResponseJson();
diff --git a/packages/webchannel-wrapper/src/index.d.ts b/packages/webchannel-wrapper/src/index.d.ts
index 4a1f45f1d70..abddec83f06 100644
--- a/packages/webchannel-wrapper/src/index.d.ts
+++ b/packages/webchannel-wrapper/src/index.d.ts
@@ -136,3 +136,19 @@ export function getStatEventTarget(): EventTarget;
 export class FetchXmlHttpFactory {
   constructor(options: {});
 }
+
+// See https://google.github.io/closure-library/api/goog.math.Integer.html
+// Unit test are written in
+// packages/firestore/test/unit/core/webchannel_wrapper.test.ts
+export class Integer {
+  constructor(bits: Array<number>, sign: number);
+  add(other: Integer): Integer;
+  multiply(other: Integer): Integer;
+  modulo(other: Integer): Integer;
+  compare(other: Integer): number;
+  toNumber(): number;
+  toString(opt_radix?: number): string;
+  getBits(index: number): number;
+  static fromNumber(value: number): Integer;
+  static fromString(str: string, opt_radix?: number): Integer;
+}
diff --git a/packages/webchannel-wrapper/src/index.js b/packages/webchannel-wrapper/src/index.js
index c51f7d68ba3..0e70ab64438 100644
--- a/packages/webchannel-wrapper/src/index.js
+++ b/packages/webchannel-wrapper/src/index.js
@@ -78,6 +78,17 @@ goog.net.XhrIo.prototype['send'] = goog.net.XhrIo.prototype.send;
 goog.net.XhrIo.prototype['setWithCredentials'] =
   goog.net.XhrIo.prototype.setWithCredentials;
 
+goog.require('goog.math.Integer');
+goog.math.Integer.prototype['add'] = goog.math.Integer.prototype.add;
+goog.math.Integer.prototype['multiply'] = goog.math.Integer.prototype.multiply;
+goog.math.Integer.prototype['modulo'] = goog.math.Integer.prototype.modulo;
+goog.math.Integer.prototype['compare'] = goog.math.Integer.prototype.compare;
+goog.math.Integer.prototype['toNumber'] = goog.math.Integer.prototype.toNumber;
+goog.math.Integer.prototype['toString'] = goog.math.Integer.prototype.toString;
+goog.math.Integer.prototype['getBits'] = goog.math.Integer.prototype.getBits;
+goog.math.Integer['fromNumber'] = goog.math.Integer.fromNumber;
+goog.math.Integer['fromString'] = goog.math.Integer.fromString;
+
 module['exports']['createWebChannelTransport'] =
   goog.net.createWebChannelTransport;
 module['exports']['getStatEventTarget'] =
@@ -89,3 +100,4 @@ module['exports']['Stat'] = goog.labs.net.webChannel.requestStats.Stat;
 module['exports']['FetchXmlHttpFactory'] = goog.net.FetchXmlHttpFactory;
 module['exports']['WebChannel'] = goog.net.WebChannel;
 module['exports']['XhrIo'] = goog.net.XhrIo;
+module['exports']['Integer'] = goog.math.Integer;