diff -Nru obus-1.1.5/debian/changelog obus-1.1.5/debian/changelog
--- obus-1.1.5/debian/changelog	2016-09-02 12:16:38.000000000 +0000
+++ obus-1.1.5/debian/changelog	2017-07-11 09:59:51.000000000 +0000
@@ -1,3 +1,15 @@
+obus (1.1.5-5ubuntu1) artful; urgency=medium
+
+  * Remove duplicate constructor, to fix FTBFS with ocaml 4.04.
+
+ -- Dimitri John Ledkov <xnox@ubuntu.com>  Tue, 11 Jul 2017 10:59:47 +0100
+
+obus (1.1.5-5build3) artful; urgency=high
+
+  * No change rebuild against ocaml 4.04.
+
+ -- Dimitri John Ledkov <xnox@ubuntu.com>  Mon, 03 Jul 2017 14:39:06 +0100
+
 obus (1.1.5-5build2) yakkety; urgency=medium
 
   * No-change rebuild for ocaml ABIs.
diff -Nru obus-1.1.5/debian/control obus-1.1.5/debian/control
--- obus-1.1.5/debian/control	2015-11-05 09:49:06.000000000 +0000
+++ obus-1.1.5/debian/control	2017-07-03 13:39:06.000000000 +0000
@@ -1,6 +1,7 @@
 Source: obus
 Priority: optional
-Maintainer: Debian OCaml Maintainers <debian-ocaml-maint@lists.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian OCaml Maintainers <debian-ocaml-maint@lists.debian.org>
 Uploaders: Stéphane Glondu <glondu@debian.org>, Nicolas Dandrimont <nicolas.dandrimont@crans.org>
 Build-Depends:
  debhelper (>= 8),
diff -Nru obus-1.1.5/debian/patches/ftbfs-ocaml4.04.patch obus-1.1.5/debian/patches/ftbfs-ocaml4.04.patch
--- obus-1.1.5/debian/patches/ftbfs-ocaml4.04.patch	1970-01-01 00:00:00.000000000 +0000
+++ obus-1.1.5/debian/patches/ftbfs-ocaml4.04.patch	2017-07-11 10:00:19.000000000 +0000
@@ -0,0 +1,28 @@
+Description: Remove duplicate constructor, to fix FTBFS with ocaml 4.04.
+Author: Dimitri John Ledkov <xnox@ubuntu.com>
+
+--- obus-1.1.5.orig/src/oBus_bus.ml
++++ obus-1.1.5/src/oBus_bus.ml
+@@ -151,9 +151,6 @@ exception Match_rule_not_found of string
+ exception Match_rule_invalid of string
+  with obus("org.freedesktop.DBus.Error.MatchRuleInvalid")
+ 
+-exception Service_unknown of string
+- with obus("org.freedesktop.DBus.Error.ServiceUnknown")
+-
+ exception Name_has_no_owner of string
+  with obus("org.freedesktop.DBus.Error.NameHasNoOwner")
+ 
+--- obus-1.1.5.orig/src/oBus_bus.mli
++++ obus-1.1.5/src/oBus_bus.mli
+@@ -152,10 +152,6 @@ val list_queued_owners : t -> OBus_name.
+   (** Return the connection unique names of applications waiting for a
+       name *)
+ 
+-exception Service_unknown of string
+-  (** Raised when we try to contact a service which is not available
+-      and the bus do not known how to start it *)
+-
+ (** {6 Messages routing} *)
+ 
+ (** Note that you should prefer using {!OBus_match.export} and
diff -Nru obus-1.1.5/debian/patches/series obus-1.1.5/debian/patches/series
--- obus-1.1.5/debian/patches/series	2015-11-05 09:49:06.000000000 +0000
+++ obus-1.1.5/debian/patches/series	2017-07-11 09:56:26.000000000 +0000
@@ -1,2 +1,3 @@
 0001-Disable-the-tests-that-need-a-working-dbus-daemon.patch
 0002-Fix-compilation-with-react-1.0.0.patch
+ftbfs-ocaml4.04.patch