diff --git a/native_client/javascript/client.ts b/native_client/javascript/client.ts
index d607060e..7d762d66 100644
--- a/native_client/javascript/client.ts
+++ b/native_client/javascript/client.ts
@@ -132,6 +132,12 @@ if (!args['stream']) {
   let stream  = model.createStream();
   conversionStream.on('data', (chunk: Buffer) => {
     stream.feedAudioContent(chunk);
+    if (args['extended']) {
+      let metadata = stream.intermediateDecodeWithMetadata();
+      console.error('intermediate: ' + candidateTranscriptToString(metadata.transcripts[0]));
+    } else {
+      console.error('intermediate: ' + stream.intermediateDecode());
+    }
   });
   conversionStream.on('end', () => {
     if (args['extended']) {
diff --git a/native_client/javascript/index.d.ts b/native_client/javascript/index.d.ts
index 339fb36e..a5d9c514 100644
--- a/native_client/javascript/index.d.ts
+++ b/native_client/javascript/index.d.ts
@@ -90,7 +90,7 @@ setScorerAlphaBeta(aLMAlpha: number, aLMBeta: number): number;
  *
  * @return The STT result. Returns undefined on error.
  */
-stt(aBuffer: object): string;
+stt(aBuffer: Buffer): string;
 
 /**
  * Use the DeepSpeech model to perform Speech-To-Text and output metadata
@@ -103,7 +103,7 @@ stt(aBuffer: object): string;
  * @return :js:func:`Metadata` object containing multiple candidate transcripts. Each transcript has per-token metadata including timing information.
  * The user is responsible for freeing Metadata by calling :js:func:`FreeMetadata`. Returns undefined on error.
  */
-sttWithMetadata(aBuffer: object, aNumResults?: number): Metadata;
+sttWithMetadata(aBuffer: Buffer, aNumResults?: number): Metadata;
 
 /**
  * Create a new streaming inference state. One can then call :js:func:`Stream.feedAudioContent` and :js:func:`Stream.finishStream` on the returned stream object.
@@ -134,7 +134,7 @@ feedAudioContent(aBuffer: Buffer): void;
  *
  * @return The STT intermediate result.
  */
-intermediateDecode(aSctx: Stream): string;
+intermediateDecode(): string;
 
 /**
  * Compute the intermediate decoding of an ongoing streaming inference, return results including metadata.
diff --git a/native_client/javascript/index.js b/native_client/javascript/index.js
index f684f503..4ce77d47 100644
--- a/native_client/javascript/index.js
+++ b/native_client/javascript/index.js
@@ -184,7 +184,7 @@ Stream.prototype.intermediateDecode = function() {
  */
 Stream.prototype.intermediateDecodeWithMetadata = function(aNumResults) {
     aNumResults = aNumResults || 1;
-    return binding.IntermediateDecode(this._impl, aNumResults);
+    return binding.IntermediateDecodeWithMetadata(this._impl, aNumResults);
 }
 
 /**