diff --git a/native_client/ctcdecode/ctc_beam_search_decoder.cpp b/native_client/ctcdecode/ctc_beam_search_decoder.cpp
index a904fc1f1f..37cb507ba4 100644
--- a/native_client/ctcdecode/ctc_beam_search_decoder.cpp
+++ b/native_client/ctcdecode/ctc_beam_search_decoder.cpp
@@ -75,7 +75,7 @@ void decoder_next(const double *probs,
     std::vector<std::pair<size_t, float>> log_prob_idx =
         get_pruned_log_probs(prob, class_dim, cutoff_prob, cutoff_top_n);
     // loop over chars
-    for (size_t index = 0; index < log_prob_idx.size(); index++) {    
+    for (size_t index = 0; index < log_prob_idx.size(); index++) {
       auto c = log_prob_idx[index].first;
       auto log_prob_c = log_prob_idx[index].second;
 
diff --git a/native_client/ctcdecode/ctc_beam_search_decoder.h b/native_client/ctcdecode/ctc_beam_search_decoder.h
index 12a2b380ac..7e83720c16 100644
--- a/native_client/ctcdecode/ctc_beam_search_decoder.h
+++ b/native_client/ctcdecode/ctc_beam_search_decoder.h
@@ -18,7 +18,7 @@
  *                 n-gram language model scoring and word insertion term.
  *                 Default null, decoding the input sample without scorer.
  * Return:
- *     A struct containing word prefixes and state variables. 
+ *     A struct containing prefixes and state variables. 
 */
 DecoderState* decoder_init(const Alphabet &alphabet,
                            int class_dim,
@@ -39,8 +39,6 @@ DecoderState* decoder_init(const Alphabet &alphabet,
  *     ext_scorer: External scorer to evaluate a prefix, which consists of
  *                 n-gram language model scoring and word insertion term.
  *                 Default null, decoding the input sample without scorer.
- * Return:
- *     A struct containing word prefixes and state variables. 
 */
 void decoder_next(const double *probs,
                   const Alphabet &alphabet,
@@ -62,7 +60,8 @@ void decoder_next(const double *probs,
  *                 n-gram language model scoring and word insertion term.
  *                 Default null, decoding the input sample without scorer.
  * Return:
- *     A struct containing word prefixes and state variables. 
+ *     A vector where each element is a pair of score and decoding result,
+ *     in descending order.
 */
 std::vector<Output> decoder_decode(DecoderState *state,
                                    const Alphabet &alphabet,