diff --git a/picard/tagger.py b/picard/tagger.py
index fb088214b..e082582f5 100644
--- a/picard/tagger.py
+++ b/picard/tagger.py
@@ -31,7 +31,6 @@ import re
 import shutil
 import signal
 import sys
-from collections import defaultdict
 from functools import partial
 from itertools import chain