diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 1c43ea4c6a..a9ab710e55 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -2676,7 +2676,7 @@ int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
  * @param[in] samples the input buffer containing the samples
  * The number of samples read from this buffer is frame_size*channels,
  * both of which are defined in \p avctx.
- * @return On error a negative value is returned, on succes zero or the number
+ * @return On error a negative value is returned, on success zero or the number
  * of bytes used to encode the data read from the input buffer.
  */
 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 4449e9c70e..5ac2b23441 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -826,7 +826,7 @@ attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
  * @endcode
  * Returns the number of microseconds contained in a time interval
  * with the specified duration or INT64_MIN if \p datestr cannot be
- * succesfully parsed.
+ * successfully parsed.
  * @param duration Flag which tells how to interpret \p datestr, if
  * not zero \p datestr is interpreted as a duration, otherwise as a
  * date.