diff --git a/dialogflow/detect.js b/dialogflow/detect.js
index 55c9ee5e8d3..83dc69b9601 100644
--- a/dialogflow/detect.js
+++ b/dialogflow/detect.js
@@ -309,9 +309,9 @@ const cli = require(`yargs`)
     },
     encoding: {
       alias: 'e',
-      default: 'AUDIO_ENCODING_LINEAR16',
+      default: 'AUDIO_ENCODING_LINEAR_16',
       choices: [
-        'AUDIO_ENCODING_LINEAR16',
+        'AUDIO_ENCODING_LINEAR_16',
         'AUDIO_ENCODING_FLAC',
         'AUDIO_ENCODING_MULAW',
         'AUDIO_ENCODING_AMR',
diff --git a/dialogflow/detect.v2beta1.js b/dialogflow/detect.v2beta1.js
index dc0ebe5dab7..e0c18bd057a 100644
--- a/dialogflow/detect.v2beta1.js
+++ b/dialogflow/detect.v2beta1.js
@@ -538,7 +538,7 @@ function detectIntentwithModelSelection(
         session: sessionPath,
         queryInput: {
           audioConfig: {
-            audioEncoding: `LINEAR16`,
+            audioEncoding: `AUDIO_ENCODING_LINEAR_16`,
             sampleRateHertz: 16000,
             languageCode: languageCode,
             model: model,
@@ -615,9 +615,9 @@ const cli = require(`yargs`)
     },
     encoding: {
       alias: 'e',
-      default: 'AUDIO_ENCODING_LINEAR16',
+      default: 'AUDIO_ENCODING_LINEAR_16',
       choices: [
-        'AUDIO_ENCODING_LINEAR16',
+        'AUDIO_ENCODING_LINEAR_16',
         'AUDIO_ENCODING_FLAC',
         'AUDIO_ENCODING_MULAW',
         'AUDIO_ENCODING_AMR',