diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index 0dab96d127..196e57dd57 100644
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -672,8 +672,9 @@
         <varlistentry>
           <term><varname>UnicastFlood=</varname></term>
           <listitem>
-            <para>A boolean. UnicastFlood configures whether a given port will flood
-            unicast traffic for which there is no FDB entry. Defaults to off.
+            <para>A boolean. Controls whether the bridge should flood
+            traffic for which an FDB entry is missing and the destination
+            is unknown through this port. Defaults to on.
             </para>
           </listitem>
         </varlistentry>
diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c
index ff0f72cfe5..e757219ec5 100644
--- a/src/network/networkd-network.c
+++ b/src/network/networkd-network.c
@@ -108,6 +108,7 @@ static int network_load_one(Manager *manager, const char *filename) {
         network->dhcp_client_identifier = DHCP_CLIENT_ID_DUID;
 
         network->use_bpdu = true;
+        network->unicast_flood = true;
 
         network->llmnr = LLMNR_SUPPORT_YES;