diff --git a/libavformat/mov.c b/libavformat/mov.c
index a28631b..ba3fb2a 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1550,6 +1550,8 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
     case AV_CODEC_ID_ADPCM_MS:
     case AV_CODEC_ID_ADPCM_IMA_WAV:
     case AV_CODEC_ID_ILBC:
+    case AV_CODEC_ID_MACE3:
+    case AV_CODEC_ID_MACE6:
         st->codec->block_align = sc->bytes_per_frame;
         break;
     case AV_CODEC_ID_ALAC: