diff --git a/beets/mediafile.py b/beets/mediafile.py
index ce42621a8..a459e09d0 100644
--- a/beets/mediafile.py
+++ b/beets/mediafile.py
@@ -1340,8 +1340,9 @@ class MediaFile(object):
             raise FileTypeError(path)
         elif (type(self.mgfile).__name__ == 'M4A' or
               type(self.mgfile).__name__ == 'MP4'):
-            if hasattr(self.mgfile.info, 'codec'):
-                if self.mgfile.codec and self.mgfile.codec.startswith('alac'):
+            info = self.mgfile.info
+            if hasattr(info, 'codec'):
+                if info.codec and info.codec.startswith('alac'):
                     self.type = 'alac'
                 else:
                     self.type = 'aac'
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 7c1366f27..be5beab9d 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -4,9 +4,15 @@ Changelog
 1.3.10 (in development)
 -----------------------
 
+New:
+
 * A new :doc:`/plugins/permissions` makes it easy to fix permissions on music
   files as they are imported. Thanks to :user:`xsteadfastx`. :bug:`1098`
 
+Fixed:
+
+* Fix a new crash with the latest version of Mutagen (1.26).
+
 
 1.3.9 (November 17, 2014)
 -------------------------