diff --git a/boost-1.73-geometry-issue721.patch b/boost-1.73-geometry-issue721.patch
new file mode 100644
index 0000000..342e1ce
--- /dev/null
+++ b/boost-1.73-geometry-issue721.patch
@@ -0,0 +1,23 @@
+From aafbceccc76dccb75963dd4f596fd1f10ee34b03 Mon Sep 17 00:00:00 2001
+From: Jonathan Wakely <boost@kayari.org>
+Date: Fri, 5 Jun 2020 19:29:27 +0100
+Subject: [PATCH] Make index::detail::rtree::visitors::insert base class public
+
+Fixes #721
+---
+ include/boost/geometry/index/detail/rtree/visitors/insert.hpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/include/boost/geometry/index/detail/rtree/visitors/insert.hpp b/include/boost/geometry/index/detail/rtree/visitors/insert.hpp
+index 2d324cb7f4..5709a930cc 100644
+--- a/include/boost/geometry/index/detail/rtree/visitors/insert.hpp
++++ b/include/boost/geometry/index/detail/rtree/visitors/insert.hpp
+@@ -265,7 +265,7 @@ struct insert_traverse_data
+ // Default insert visitor
+ template <typename Element, typename MembersHolder>
+ class insert
+-    : MembersHolder::visitor
++    : public MembersHolder::visitor
+ {
+ protected:
+     typedef typename MembersHolder::box_type box_type;
diff --git a/boost.spec b/boost.spec
index 9379234..ef64467 100644
--- a/boost.spec
+++ b/boost.spec
@@ -42,7 +42,7 @@ Name: boost
 %global real_name boost
 Summary: The free peer-reviewed portable C++ source libraries
 Version: 1.73.0
-Release: 3%{?dist}
+Release: 4%{?dist}
 License: Boost and MIT and Python
 
 # Replace each . with _ in %%{version}
@@ -159,6 +159,9 @@ Patch89: boost-1.73.0-outcome-assert.patch
 # https://github.com/boostorg/beast/pull/1927
 Patch90: boost-1.73.0-beast-coroutines.patch
 
+# https://github.com/boostorg/geometry/issues/721
+Patch91: boost-1.73-geometry-issue721.patch
+
 %bcond_with tests
 %bcond_with docs_generated
 
@@ -673,6 +676,7 @@ find ./boost -name '*.hpp' -perm /111 | xargs chmod a-x
 %patch88 -p1
 %patch89 -p1
 %patch90 -p1
+%patch91 -p1
 
 %build
 # Dump the versions being used into the build logs.
@@ -1283,6 +1287,9 @@ fi
 %{_mandir}/man1/b2.1*
 
 %changelog
+* Fri Jun 05 2020 Jonathan Wakely <jwakely@redhat.com> - 1.73.0-4
+- Add patch for Boost.Geometry issue #721
+
 * Fri May 29 2020 Jonathan Wakely <jwakely@redhat.com> - 1.73.0-3
 - Rebuilt for Python 3.9