diff --git a/libavutil/samplefmt.h b/libavutil/samplefmt.h
index 43a57a422c..6e55d71140 100644
--- a/libavutil/samplefmt.h
+++ b/libavutil/samplefmt.h
@@ -122,8 +122,7 @@ enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt);
  * @param sample_fmt the number of the sample format to print the
  * corresponding info string, or a negative value to print the
  * corresponding header.
- * @return the pointer to the filled buffer or NULL if sample_fmt is
- * unknown or in case of other errors
+ * @return the pointer to the filled buffer or NULL in case of other errors
  */
 char *av_get_sample_fmt_string(char *buf, int buf_size, enum AVSampleFormat sample_fmt);