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-rw-r--r--src/zope/configuration/config.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/zope/configuration/config.py b/src/zope/configuration/config.py
index 0123021..30a7566 100644
--- a/src/zope/configuration/config.py
+++ b/src/zope/configuration/config.py
@@ -37,6 +37,7 @@ from zope.configuration._compat import builtins
from zope.configuration._compat import reraise
from zope.configuration._compat import string_types
from zope.configuration._compat import text_type
+from zope.configuration._compat import implementer_if_needed
__all__ = [
'ConfigurationContext',
@@ -897,7 +898,7 @@ class RootStackItem(object):
def finish(self):
pass
-@implementer(IStackItem)
+@implementer_if_needed(IStackItem)
class GroupingStackItem(RootStackItem):
"""
Stack item for a grouping directive