diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c
index b7c604eaea..519a473995 100644
--- a/src/network/bridge_driver.c
+++ b/src/network/bridge_driver.c
@@ -2336,6 +2336,9 @@ networkStartNetworkVirtual(virNetworkDriverStatePtr driver,
 
     /* Set bridge options */
 
+    if (def->mtu && virNetDevSetMTU(def->bridge, def->mtu) < 0)
+        goto error;
+
     /* delay is configured in seconds, but virNetDevBridgeSetSTPDelay
      * expects milliseconds
      */