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-rw-r--r--pkg_resources/__init__.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkg_resources/__init__.py b/pkg_resources/__init__.py
index c3e3e96c..08677719 100644
--- a/pkg_resources/__init__.py
+++ b/pkg_resources/__init__.py
@@ -861,7 +861,7 @@ class WorkingSet(object):
result = []
if req in extra_req_mapping:
- for extra in extra_req_mapping[req] or ['']:
+ for extra in extra_req_mapping[req]:
result.append(req.marker.evaluate({'extra': extra}))
else:
result.append(req.marker.evaluate())