diff --git a/debian/changelog b/debian/changelog
index c820fd9a..9891943c 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+livecd-rootfs (2.208.15) trusty; urgency=medium
+
+  * Fix security mirror sources.list entries for non-x86 architectures by
+    backporting trunk revision 1408. (LP: #1711735)
+
+ -- Michael Hudson-Doyle <michael.hudson@ubuntu.com>  Mon, 30 Oct 2017 12:18:48 +1300
+
 livecd-rootfs (2.208.14) trusty; urgency=medium
 
   [ Robert C. Jennings ]
diff --git a/live-build/auto/build b/live-build/auto/build
index dcfcc8cf..235ed3b8 100755
--- a/live-build/auto/build
+++ b/live-build/auto/build
@@ -99,12 +99,12 @@ deb $LB_PARENT_MIRROR_BINARY $LB_DISTRIBUTION-backports main restricted universe
 # deb http://archive.canonical.com/ubuntu $LB_DISTRIBUTION partner
 # deb-src http://archive.canonical.com/ubuntu $LB_DISTRIBUTION partner
 
-deb http://security.ubuntu.com/ubuntu $LB_DISTRIBUTION-security main restricted
-# deb-src http://security.ubuntu.com/ubuntu $LB_DISTRIBUTION-security main restricted
-deb http://security.ubuntu.com/ubuntu $LB_DISTRIBUTION-security universe
-# deb-src http://security.ubuntu.com/ubuntu $LB_DISTRIBUTION-security universe
-deb http://security.ubuntu.com/ubuntu $LB_DISTRIBUTION-security multiverse
-# deb-src http://security.ubuntu.com/ubuntu $LB_DISTRIBUTION-security multiverse
+deb $LB_PARENT_MIRROR_BINARY_SECURITY $LB_DISTRIBUTION-security main restricted
+# deb-src $LB_PARENT_MIRROR_BINARY_SECURITY $LB_DISTRIBUTION-security main restricted
+deb $LB_PARENT_MIRROR_BINARY_SECURITY $LB_DISTRIBUTION-security universe
+# deb-src $LB_PARENT_MIRROR_BINARY_SECURITY $LB_DISTRIBUTION-security universe
+deb $LB_PARENT_MIRROR_BINARY_SECURITY $LB_DISTRIBUTION-security multiverse
+# deb-src $LB_PARENT_MIRROR_BINARY_SECURITY $LB_DISTRIBUTION-security multiverse
 EOF
 
 	fi