diff --git a/src/pcm/pcm_mmap.c b/src/pcm/pcm_mmap.c
index 9600c383..9cbaae05 100644
--- a/src/pcm/pcm_mmap.c
+++ b/src/pcm/pcm_mmap.c
@@ -183,7 +183,7 @@ snd_pcm_sframes_t snd_pcm_mmap_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_ufram
  * \brief Read interleaved frames from a PCM using direct buffer (mmap)
  * \param pcm PCM handle
  * \param buffer frames containing buffer
- * \param size frames to be written
+ * \param size frames to be read
  * \return a positive number of frames actually read otherwise a
  * negative error code
  * \retval -EBADFD PCM is not in the right state (#SND_PCM_STATE_PREPARED or #SND_PCM_STATE_RUNNING)