#5581: fget argument of abstractproperty is optional as well.
diff --git a/Doc/library/abc.rst b/Doc/library/abc.rst
index 9461aa5..d591daa 100644
--- a/Doc/library/abc.rst
+++ b/Doc/library/abc.rst
@@ -161,7 +161,7 @@
multiple-inheritance.
-.. function:: abstractproperty(fget[, fset[, fdel[, doc]]])
+.. function:: abstractproperty([fget[, fset[, fdel[, doc]]]])
A subclass of the built-in :func:`property`, indicating an abstract property.
@@ -189,6 +189,7 @@
def setx(self, value): ...
x = abstractproperty(getx, setx)
+
.. rubric:: Footnotes
.. [#] C++ programmers should note that Python's virtual base class