diff --git a/debian/changelog b/debian/changelog
index 2610c164..8e874004 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+livecd-rootfs (2.228) UNRELEASED; urgency=medium
+
+  * Pass --mirror-binary in the ubuntu-rtm case too; this isn't inherited
+    from the bootstrap mirror.
+
+ -- Colin Watson <cjwatson@ubuntu.com>  Wed, 23 Jul 2014 11:48:21 +0100
+
 livecd-rootfs (2.227) utopic; urgency=medium
 
   * Pass --mirror-chroot-security and --mirror-binary-security in the
diff --git a/live-build/auto/config b/live-build/auto/config
index d3aafda5..8d054b46 100755
--- a/live-build/auto/config
+++ b/live-build/auto/config
@@ -347,11 +347,13 @@ case $PROJECT in
 			OPTS="${OPTS:+$OPTS }--apt-secure false"
 			OPTS="${OPTS:+$OPTS }--mirror-chroot-security ${MIRROR}"
 			OPTS="${OPTS:+$OPTS }--mirror-binary-security ${MIRROR}"
+			OPTS="${OPTS:+$OPTS }--mirror-binary ${MIRROR}"
 			;;
 		    ubuntu-rtm)
 			MIRROR=http://derived.archive.canonical.com/ubuntu-rtm/
 			OPTS="${OPTS:+$OPTS }--mirror-chroot-security ${MIRROR}"
 			OPTS="${OPTS:+$OPTS }--mirror-binary-security ${MIRROR}"
+			OPTS="${OPTS:+$OPTS }--mirror-binary ${MIRROR}"
 			;;
 		esac
 		;;