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-rw-r--r--numpy/lib/function_base.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/numpy/lib/function_base.py b/numpy/lib/function_base.py
index b9f0d58d2..90caac062 100644
--- a/numpy/lib/function_base.py
+++ b/numpy/lib/function_base.py
@@ -2303,7 +2303,7 @@ class vectorize:
self._ufunc = {} # Caching to improve default performance
self._doc = None
self.__doc__ = doc
- if doc is None:
+ if doc is None and hasattr(pyfunc, '__doc__'):
self.__doc__ = pyfunc.__doc__
else:
self._doc = doc