diff --git a/changes-entries/pr70295.txt b/changes-entries/pr70295.txt
index 7d3c73758b3..b9a24f78e5e 100644
--- a/changes-entries/pr70295.txt
+++ b/changes-entries/pr70295.txt
@@ -1,2 +1,2 @@
-  *) mod_remote_ip: Fix REMOTE_PORT in expressions and environment variables.
+  *) core: Fix REMOTE_PORT in expressions and environment variables.
      PR 70295. [Steve Bennett <S.Bennett lancaster.ac.uk>]
diff --git a/docs/manual/expr.xml b/docs/manual/expr.xml
index 89e1a46f0b9..250f74046d2 100644
--- a/docs/manual/expr.xml
+++ b/docs/manual/expr.xml
@@ -719,7 +719,7 @@ DIGIT       ::= &lt;any US-ASCII digit "0".."9"&gt;
     <code>SERVER_PROTOCOL_VERSION_MAJOR</code> and
     <code>SERVER_PROTOCOL_VERSION_MINOR</code>
     <a href="#vars">variables</a>
-    are available for versions 2.5.0 and later.</p>
+    are available for versions 2.4.71 and later.</p>
 </section>
 
 <section id="examples">
diff --git a/test/modules/core/test_013_expr_proto_version.py b/test/modules/core/test_013_expr_proto_version.py
new file mode 100644
index 00000000000..aa57e8f1261
--- /dev/null
+++ b/test/modules/core/test_013_expr_proto_version.py
@@ -0,0 +1,41 @@
+import pytest
+
+from pyhttpd.backport import not_backported
+from pyhttpd.conf import HttpdConf
+
+pytestmark = not_backported("r1410755",
+                            "SERVER_PROTOCOL_VERSION ap_expr variables",
+                            backported_in="2.4.71")
+
+
+# The variables do not parse on a server without them, so the restart
+# status is checked by each test rather than here.
+@pytest.fixture(scope='module')
+def restart_rc(env):
+    conf = HttpdConf(env, extras={
+        'base': """
+    ErrorDocument 404 "v=%{SERVER_PROTOCOL_VERSION} major=%{SERVER_PROTOCOL_VERSION_MAJOR} minor=%{SERVER_PROTOCOL_VERSION_MINOR}"
+    """
+    })
+    conf.add_vhost_test1()
+    conf.install()
+    return env.apache_restart()
+
+
+class TestExprProtoVersion:
+
+    def get(self, env, restart_rc, options):
+        assert restart_rc == 0
+        r = env.curl_get(env.mkurl("http", "test1", "/no-such-file"),
+                         options=options)
+        assert r.response, f"no response: {r.stderr}"
+        assert r.response["status"] == 404
+        return r.response["body"].decode().strip()
+
+    def test_core_013_01_http11(self, env, restart_rc):
+        assert self.get(env, restart_rc, ['--http1.1']) == \
+            "v=1001 major=1 minor=1"
+
+    def test_core_013_02_http10(self, env, restart_rc):
+        assert self.get(env, restart_rc, ['--http1.0']) == \
+            "v=1000 major=1 minor=0"
diff --git a/test/modules/metadata/test_004_remoteip.py b/test/modules/metadata/test_004_remoteip.py
index 8afca7784c7..dfc8a3aab68 100644
--- a/test/modules/metadata/test_004_remoteip.py
+++ b/test/modules/metadata/test_004_remoteip.py
@@ -245,7 +245,8 @@ def test_metadata_004_06(self, env):
     # wherever a configuration asks for it: the REMOTE_PORT variable of
     # ap_expr (here via mod_headers) and the CGI/SSI REMOTE_PORT variable
     # (here via mod_include).  Bug 70295.
-    REMOTE_PORT_FIX = not_backported("gh-896", "REMOTE_PORT from the useragent address")
+    REMOTE_PORT_FIX = not_backported("gh-896", "REMOTE_PORT from the useragent address",
+                                     backported_in="2.4.71")
 
     def remote_port_install(self, env):
         """A PROXY protocol vhost on http_port2 and an X-Forwarded-For one