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-rw-r--r--git/diff.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/git/diff.py b/git/diff.py
index 67d1986c..7a75ffed 100644
--- a/git/diff.py
+++ b/git/diff.py
@@ -16,7 +16,7 @@ from git.compat import (
)
-__all__ = ('Diffable', 'DiffIndex', 'Diff')
+__all__ = ('Diffable', 'DiffIndex', 'Diff', 'NULL_TREE')
# Special object to compare against the empty tree in diffs
NULL_TREE = object()