diff --git a/src/v1/text_to_speech_client.ts b/src/v1/text_to_speech_client.ts
index ddb64e62..19666a89 100644
--- a/src/v1/text_to_speech_client.ts
+++ b/src/v1/text_to_speech_client.ts
@@ -22,6 +22,7 @@ import {Callback, CallOptions, Descriptors, ClientOptions} from 'google-gax';
 import * as path from 'path';
 
 import * as protos from '../../protos/protos';
+import jsonProtos = require('../../protos/protos.json');
 /**
  * Client JSON configuration object, loaded from
  * `src/v1/text_to_speech_client_config.json`.
@@ -135,22 +136,7 @@ export class TextToSpeechClient {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
     }
     // Load the applicable protos.
-    // For Node.js, pass the path to JSON proto file.
-    // For browsers, pass the JSON content.
-
-    const nodejsProtoPath = path.join(
-      __dirname,
-      '..',
-      '..',
-      'protos',
-      'protos.json'
-    );
-    this._protos = this._gaxGrpc.loadProto(
-      opts.fallback
-        ? // eslint-disable-next-line @typescript-eslint/no-var-requires
-          require('../../protos/protos.json')
-        : nodejsProtoPath
-    );
+    this._protos = this._gaxGrpc.loadProtoJSON(jsonProtos);
 
     // Put together the default options sent with requests.
     this._defaults = this._gaxGrpc.constructSettings(
diff --git a/src/v1beta1/text_to_speech_client.ts b/src/v1beta1/text_to_speech_client.ts
index 6fc96d6c..db341d99 100644
--- a/src/v1beta1/text_to_speech_client.ts
+++ b/src/v1beta1/text_to_speech_client.ts
@@ -22,6 +22,7 @@ import {Callback, CallOptions, Descriptors, ClientOptions} from 'google-gax';
 import * as path from 'path';
 
 import * as protos from '../../protos/protos';
+import jsonProtos = require('../../protos/protos.json');
 /**
  * Client JSON configuration object, loaded from
  * `src/v1beta1/text_to_speech_client_config.json`.
@@ -135,22 +136,7 @@ export class TextToSpeechClient {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);
     }
     // Load the applicable protos.
-    // For Node.js, pass the path to JSON proto file.
-    // For browsers, pass the JSON content.
-
-    const nodejsProtoPath = path.join(
-      __dirname,
-      '..',
-      '..',
-      'protos',
-      'protos.json'
-    );
-    this._protos = this._gaxGrpc.loadProto(
-      opts.fallback
-        ? // eslint-disable-next-line @typescript-eslint/no-var-requires
-          require('../../protos/protos.json')
-        : nodejsProtoPath
-    );
+    this._protos = this._gaxGrpc.loadProtoJSON(jsonProtos);
 
     // Put together the default options sent with requests.
     this._defaults = this._gaxGrpc.constructSettings(