diff --git a/openwrt/package/ppp/files/ifup.pppoa b/openwrt/package/ppp/files/ifup.pppoa
index 449c6d53dc4a799ca12f405a31aa826eaf27f44f..fc2e82eff56e783ff42e1124543ff682ced28d0e 100644
--- a/openwrt/package/ppp/files/ifup.pppoa
+++ b/openwrt/package/ppp/files/ifup.pppoa
@@ -25,7 +25,6 @@ while :; do
   IDLETIME=${IDLETIME:+lcp-echo-failure $IDLETIME}
   MTU=$(nvram get ppp_mtu)
   MTU=${MTU:-1500}
-  MTU=${MTU:+ mtu $MTU mru $MTU}
 
   /usr/sbin/pppd nodetach \
 	plugin pppoatm.so ${VPI:-8}.${VCI:-35} \
@@ -34,7 +33,7 @@ while :; do
   	linkname $type \
   	user "$USERNAME" \
   	password "$PASSWORD" \
-  	$MTU \
+  	mtu $MTU mru $MTU
   	$IDLETIME \
   	$REDIAL
   
diff --git a/openwrt/package/ppp/files/ifup.pppoe b/openwrt/package/ppp/files/ifup.pppoe
index 111113122229c1326b38ad8dbf8ff5b22c5ca406..a30dd2a9d9936c6efdc0799a01a75f9841a111e9 100644
--- a/openwrt/package/ppp/files/ifup.pppoe
+++ b/openwrt/package/ppp/files/ifup.pppoe
@@ -24,7 +24,6 @@ while :; do
   IDLETIME=${IDLETIME:+lcp-echo-failure $IDLETIME}
   MTU=$(nvram get ppp_mtu)
   MTU=${MTU:-1492}
-  MTU=${MTU:+ mtu $MTU mru $MTU}
 
   ifconfig $IFNAME up
   /usr/sbin/pppd nodetach \
@@ -35,7 +34,7 @@ while :; do
   	linkname $type \
   	user "$USERNAME" \
   	password "$PASSWORD" \
-  	$MTU \
+  	mtu $MTU mru $MTU
   	$IDLETIME \
   	$REDIAL \
   	nic-$IFNAME