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-rw-r--r--src/zope/interface/registry.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/zope/interface/registry.py b/src/zope/interface/registry.py
index 3f1306f..90ae1ad 100644
--- a/src/zope/interface/registry.py
+++ b/src/zope/interface/registry.py
@@ -550,7 +550,7 @@ def _getAdapterRequired(factory, required):
r = implementedBy(r)
else:
raise TypeError("Required specification must be a "
- "specification or class."
+ "specification or class, not %r" % type(r)
)
result.append(r)
return tuple(result)