diff --git a/debian/changelog b/debian/changelog
index 730db8618..9846d8a79 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -21,6 +21,9 @@ systemd (219-8) UNRELEASED; urgency=medium
   * hwdb: Fix wireless switch on Dell Latitude (LP: #1441849)
   * Fix assertion crash when reading a service file with missing ' and
     trailing space. (LP: #1447243)
+  * ifup@.service: Set IgnoreOnIsolate, so that "systemctl default" does not
+    shut down network interfaces. (LP: #1449380). Add PartOf=network.target,
+    so that stopping network.target also stops network interfaces.
 
  -- Michael Biebl <biebl@debian.org>  Mon, 13 Apr 2015 20:46:34 +0200
 
diff --git a/debian/extra/units/ifup@.service b/debian/extra/units/ifup@.service
index 7eb2f1020..003bbd701 100644
--- a/debian/extra/units/ifup@.service
+++ b/debian/extra/units/ifup@.service
@@ -1,10 +1,12 @@
 [Unit]
 Description=ifup for %I
 After=local-fs.target network-pre.target networking.service
+PartOf=network.target
 Before=network.target
 BindsTo=sys-subsystem-net-devices-%i.device
 ConditionPathIsDirectory=/run/network
 DefaultDependencies=no
+IgnoreOnIsolate=yes
 
 [Service]
 Type=oneshot