diff --git a/beets/util/collections.py b/beets/util/collections.py
index 6813b95df..696dc9a98 100644
--- a/beets/util/collections.py
+++ b/beets/util/collections.py
@@ -12,9 +12,12 @@
 #
 # The above copyright notice and this permission notice shall be
 # included in all copies or substantial portions of the Software.
-"""Custom collections classes
+
+"""Custom collections classes.
 """
 
+from __future__ import division, absolute_import, print_function
+
 
 class IdentityFallbackDict(dict):
     """A dictionary which is "transparent" (maps keys to themselves) for all