diff -Nru ifenslave-2.4ubuntu1.1/debian/changelog ifenslave-2.4ubuntu1.2/debian/changelog
--- ifenslave-2.4ubuntu1.1/debian/changelog	2015-08-06 23:00:43.000000000 +0200
+++ ifenslave-2.4ubuntu1.2/debian/changelog	2015-10-21 14:19:59.000000000 +0200
@@ -1,3 +1,9 @@
+ifenslave (2.4ubuntu1.2) trusty; urgency=medium
+
+  * Don't depend on /run/network/ifstate. (LP: #1337873)
+
+ -- Dariusz Gadomski <dariusz.gadomski@canonical.com>  Thu, 01 Oct 2015 11:30:24 +0200
+
 ifenslave (2.4ubuntu1.1) trusty; urgency=medium
 
   * Fix change in /sys/class/net/{bond}/slave_ naming after kernel v3.13
diff -Nru ifenslave-2.4ubuntu1.1/debian/control ifenslave-2.4ubuntu1.2/debian/control
--- ifenslave-2.4ubuntu1.1/debian/control	2014-03-03 16:31:21.000000000 +0100
+++ ifenslave-2.4ubuntu1.2/debian/control	2015-10-01 11:36:19.000000000 +0200
@@ -12,7 +12,7 @@
 Package: ifenslave
 Architecture: all
 Multi-Arch: foreign
-Depends: ${misc:Depends}, ifupdown, iproute2
+Depends: ${misc:Depends}, ifupdown (>= 0.7.47~lp1337873~1), iproute2
 Recommends: net-tools
 Breaks: ifenslave-2.6 (<< 1.1.0-22)
 Replaces: ifenslave-2.6 (<< 1.1.0-22)
diff -Nru ifenslave-2.4ubuntu1.1/debian/ifenslave.if-post-down ifenslave-2.4ubuntu1.2/debian/ifenslave.if-post-down
--- ifenslave-2.4ubuntu1.1/debian/ifenslave.if-post-down	2013-11-13 21:37:43.000000000 +0100
+++ ifenslave-2.4ubuntu1.2/debian/ifenslave.if-post-down	2015-10-01 11:33:17.000000000 +0200
@@ -2,6 +2,8 @@
 
 [ "$VERBOSITY" = 1 ] && set -x
 
+[ "$ADDRFAM" = meta ] && exit 0
+
 sysfs()
 {
 	# Called with :
@@ -25,7 +27,6 @@
 }
 
 BOND_PARAMS="/sys/class/net/$IFACE/bonding"
-IFSTATE=/run/network/ifstate
 
 # free $IFACE if it is currently enslaved to a bonding device.
 if [ -f "/sys/class/net/$IFACE/master/bonding/slaves" ] ; then
@@ -53,9 +54,8 @@
 [ "$VERBOSITY" = 1 ] && v=-v
 read slaves < "$BOND_PARAMS/slaves"
 for slave in $slaves ; do
-	# If $slave is currently up in $IFSTATE, then bring it down, to keep $IFSTATE consistent.
 	# This is supposed to have the side effect of freeing the interface.
-	grep -q "^$slave=" $IFSTATE && ifdown $v $slave
+	ifquery --state $slave && ifdown $v $slave
 
 	# Anyway, ensure $slave is free.
 	if [ -f "/sys/class/net/$slave/master/bonding/slaves" ] ; then
diff -Nru ifenslave-2.4ubuntu1.1/debian/ifenslave.if-pre-up ifenslave-2.4ubuntu1.2/debian/ifenslave.if-pre-up
--- ifenslave-2.4ubuntu1.1/debian/ifenslave.if-pre-up	2013-11-13 21:46:56.000000000 +0100
+++ ifenslave-2.4ubuntu1.2/debian/ifenslave.if-pre-up	2015-10-01 11:34:09.000000000 +0200
@@ -2,7 +2,7 @@
 
 [ "$VERBOSITY" = 1 ] && set -x
 
-IFSTATE=/run/network/ifstate
+[ "$ADDRFAM" = meta ] && exit 0
 
 add_master()
 {
@@ -145,7 +145,7 @@
 
 	[ "$VERBOSITY" = 1 ] && v=-v
 	for slave in $BOND_SLAVES ; do
-		if ( [ "$AUTOIF" ] && grep -q "^$slave=" $IFSTATE ) ; then
+		if ( [ "$AUTOIF" ] && ifquery --state $slave ) ; then
 			echo "Not enslaving interface $slave since it is already configured"
 		else
 			# Ensure $slave is down.
diff -Nru ifenslave-2.4ubuntu1.1/debian/ifenslave.if-up ifenslave-2.4ubuntu1.2/debian/ifenslave.if-up
--- ifenslave-2.4ubuntu1.1/debian/ifenslave.if-up	2013-11-13 21:37:43.000000000 +0100
+++ ifenslave-2.4ubuntu1.2/debian/ifenslave.if-up	2015-10-01 11:31:25.000000000 +0200
@@ -2,6 +2,8 @@
 
 [ "$VERBOSITY" = 1 ] && set -x
 
+[ "$ADDRFAM" = meta ] && exit 0
+
 sysfs()
 {
 	# Called with :