--- a/MIMETypes.st	Sat Nov 02 00:11:58 2019 +0100
+++ b/MIMETypes.st	Fri Nov 08 10:18:20 2019 +0100
@@ -748,7 +748,7 @@
         ('ram' 'rm')            'audio/x-pn-realaudio'
         "/ cg: see unixSpecific / windowsSpecific
         "/        'rpm'                   'audio/x-pn-realaudio-plugin'
-        ('mpa' 'mpega' 'mpga')  'audio/mpeg'
+        ('mpa' 'mpega' 'mpga' 'm4a')  'audio/mpeg'
         "/        'mp3'                   'audio/x-mp3'
         ('mp3' 'mp2')           'audio/mpeg'
         'wav'                   'audio/x-wav'