diff --git a/include/bitcoin/network/settings.hpp b/include/bitcoin/network/settings.hpp
index 3d26915fc..1d51e5deb 100644
--- a/include/bitcoin/network/settings.hpp
+++ b/include/bitcoin/network/settings.hpp
@@ -413,6 +413,7 @@ struct BCT_API settings
     bool enable_alert{ false };
     bool enable_reject{ false };
     bool enable_not_found{ false };
+    bool enable_memory_pool{ false };
     bool enable_relay{ false };
     bool validate_checksum{ false };
     bool gossip_ipv4{ true };
diff --git a/src/messages/peer/detail/version.cpp b/src/messages/peer/detail/version.cpp
index f4f2347e8..b23c9735e 100644
--- a/src/messages/peer/detail/version.cpp
+++ b/src/messages/peer/detail/version.cpp
@@ -76,9 +76,8 @@ version version::deserialize(uint32_t version, reader& source) NOEXCEPT
         // This ignores the specified version, instead respecting the peer's
         // version, since the specified version is not yet negotiated. A true
         // relay value may then be ignored when negotiated version is < bip37.
-        // If value >= bip37 with no relay byte, the source is invalidated.
-        return (value >= level::bip37) && (source.is_exhausted() ||
-            to_bool(source.read_byte()));
+        return (value < level::bip37) || source.is_exhausted() ||
+            to_bool(source.read_byte());
     };
 
     // ************************************************************************
diff --git a/test/messages/peer/detail/version.cpp b/test/messages/peer/detail/version.cpp
index 726dfbd33..e36787b2c 100644
--- a/test/messages/peer/detail/version.cpp
+++ b/test/messages/peer/detail/version.cpp
@@ -63,6 +63,47 @@ BOOST_AUTO_TEST_CASE(version__size__default_bip37_version__expected)
     BOOST_REQUIRE_EQUAL(version{}.size(level::maximum_protocol), expected);
 }
 
+// relay
+
+BOOST_AUTO_TEST_CASE(version__deserialize__pre_bip37__relay_true)
+{
+    version instance{};
+    instance.value = level::bip35;
+    instance.relay = false;
+    data_chunk data(instance.size(level::bip35));
+    BOOST_REQUIRE(instance.serialize(level::bip35, data));
+
+    const auto message = version::deserialize(level::bip35, data);
+    BOOST_REQUIRE(message);
+    BOOST_REQUIRE(message->relay);
+}
+
+BOOST_AUTO_TEST_CASE(version__deserialize__bip37_relay_false__relay_false)
+{
+    version instance{};
+    instance.value = level::bip37;
+    instance.relay = false;
+    data_chunk data(instance.size(level::bip37));
+    BOOST_REQUIRE(instance.serialize(level::bip37, data));
+
+    const auto message = version::deserialize(level::bip37, data);
+    BOOST_REQUIRE(message);
+    BOOST_REQUIRE(!message->relay);
+}
+
+BOOST_AUTO_TEST_CASE(version__deserialize__bip37_relay_true__relay_true)
+{
+    version instance{};
+    instance.value = level::bip37;
+    instance.relay = true;
+    data_chunk data(instance.size(level::bip37));
+    BOOST_REQUIRE(instance.serialize(level::bip37, data));
+
+    const auto message = version::deserialize(level::bip37, data);
+    BOOST_REQUIRE(message);
+    BOOST_REQUIRE(message->relay);
+}
+
 // wire examples
 
 // "/Satoshi:1.1.1/" (70006) no relay
diff --git a/test/settings.cpp b/test/settings.cpp
index 3bfcfd70e..c330510e3 100644
--- a/test/settings.cpp
+++ b/test/settings.cpp
@@ -45,6 +45,7 @@ BOOST_AUTO_TEST_CASE(settings__construct__default__expected)
     BOOST_REQUIRE_EQUAL(instance.enable_alert, false);
     BOOST_REQUIRE_EQUAL(instance.enable_reject, false);
     BOOST_REQUIRE_EQUAL(instance.enable_not_found, false);
+    BOOST_REQUIRE_EQUAL(instance.enable_memory_pool, false);
     BOOST_REQUIRE_EQUAL(instance.enable_relay, false);
     BOOST_REQUIRE_EQUAL(instance.validate_checksum, false);
     BOOST_REQUIRE_EQUAL(instance.identifier, 3652501241u);