diff -r ae76a1046bb9 Lib/plistlib.py
--- a/Lib/plistlib.py	Wed Mar 16 14:30:16 2016 +0100
+++ b/Lib/plistlib.py	Thu Apr 07 09:49:12 2016 +0200
@@ -703,8 +703,9 @@
             s = self._get_size(tokenL)
             return self._fp.read(s * 2).decode('utf-16be')
 
-        # tokenH == 0x80 is documented as 'UID' and appears to be used for
-        # keyed-archiving, not in plists.
+        elif tokenH == 0x80:
+            s = self._get_size(tokenL)
+            return self._fp.read(s).decode('ascii')
 
         elif tokenH == 0xA0:  # array
             s = self._get_size(tokenL)