diff -ru picard.orig/formats/id3.py picard/formats/id3.py
--- picard.orig/formats/id3.py	2015-01-06 23:01:43.000000000 +0100
+++ picard/formats/id3.py	2016-08-08 10:07:49.897447802 +0200
@@ -42,7 +42,7 @@
         enc, term = self.encodings[frame.encoding]
     return value.encode(enc, 'ignore') + term
 
-id3.EncodedTextSpec.write = patched_EncodedTextSpec_write
+id3._specs.EncodedTextSpec.write = patched_EncodedTextSpec_write
 
 
 # One more "monkey patch". The ID3 spec says that multiple text
@@ -51,7 +51,7 @@
 def patched_MultiSpec_write(self, frame, value):
     data = self._write_orig(frame, value)
     spec = self.specs[-1]
-    if isinstance(spec, id3.EncodedTextSpec):
+    if isinstance(spec, id3._specs.EncodedTextSpec):
         try:
             term = spec._encodings[frame.encoding][1]
         except AttributeError:
@@ -61,8 +61,8 @@
     return data
 
 
-id3.MultiSpec._write_orig = id3.MultiSpec.write
-id3.MultiSpec.write = patched_MultiSpec_write
+id3._specs.MultiSpec._write_orig = id3._specs.MultiSpec.write
+id3._specs.MultiSpec.write = patched_MultiSpec_write
 
 
 id3.TCMP = compatid3.TCMP
diff -ru picard.orig/formats/mutagenext/compatid3.py picard/formats/mutagenext/compatid3.py
--- picard.orig/formats/mutagenext/compatid3.py	2016-08-08 09:57:59.177734598 +0200
+++ picard/formats/mutagenext/compatid3.py	2016-08-08 10:07:49.897447802 +0200
@@ -23,7 +23,8 @@
 import mutagen
 from mutagen._util import insert_bytes
 from mutagen.id3 import ID3, Frames, Frames_2_2, TextFrame, TORY, \
-    TYER, TIME, APIC, IPLS, TDAT, BitPaddedInt, MakeID3v1
+    TYER, TIME, APIC, IPLS, TDAT, MakeID3v1
+from mutagen.id3._util import BitPaddedInt
 
 
 class TCMP(TextFrame):