diff --git a/picard/formats/apev2.py b/picard/formats/apev2.py
index a0afa0c21..73ae1c9e2 100644
--- a/picard/formats/apev2.py
+++ b/picard/formats/apev2.py
@@ -38,7 +38,7 @@ class APEv2File(File):
         "BPM": "bpm",
         "ISRC": "isrc",
         "CatalogNumber": "catalognumber",
-        "BarCode": "barcode",
+        "Barcode": "barcode",
         "EncodedBy": "encodedby",
         "MUSICBRAINZ_ALBUMSTATUS": "releasestatus",
         "MUSICBRAINZ_ALBUMTYPE": "releasetype",
diff --git a/picard/formats/mp4.py b/picard/formats/mp4.py
index 01fb6266f..1be11ab50 100644
--- a/picard/formats/mp4.py
+++ b/picard/formats/mp4.py
@@ -69,6 +69,8 @@ class MP4File(File):
         "----:com.apple.iTunes:MusicBrainz Disc Id": "musicbrainz_discid",
         "----:com.apple.iTunes:MusicBrainz TRM Id": "musicbrainz_trmid",
         "----:com.apple.iTunes:ASIN": "asin",
+        "----:com.apple.iTunes:Barcode": "barcode",
+        "----:com.apple.iTunes:Producer": "producer",
     }
     __r_freeform_tags = dict([(v, k) for k, v in __freeform_tags.iteritems()])