diff -Nru rdup-1.1.15/debian/changelog rdup-1.1.15/debian/changelog
--- rdup-1.1.15/debian/changelog	2017-01-07 22:58:37.000000000 +0000
+++ rdup-1.1.15/debian/changelog	2019-10-31 17:32:49.000000000 +0000
@@ -1,3 +1,9 @@
+rdup (1.1.15-1+rpi1) bullseye-staging; urgency=medium
+
+  * Remove -Werror (Downgrades: 941101)
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Thu, 31 Oct 2019 17:32:49 +0000
+
 rdup (1.1.15-1) unstable; urgency=low
 
   * New upstream version 1.1.15
diff -Nru rdup-1.1.15/debian/patches/0003-no-werror.patch rdup-1.1.15/debian/patches/0003-no-werror.patch
--- rdup-1.1.15/debian/patches/0003-no-werror.patch	1970-01-01 00:00:00.000000000 +0000
+++ rdup-1.1.15/debian/patches/0003-no-werror.patch	2019-10-31 17:32:49.000000000 +0000
@@ -0,0 +1,30 @@
+Description: Remove -Werror
+ Werror causes build failure due to deprecated nettle functions
+ and due to a complaint about memmove.
+Author: Peter Michael Green <plugwash@raspbian.org>
+Bug-Debian: https://bugs.debian.org/941101
+
+---
+The information above should follow the Patch Tagging Guidelines, please
+checkout http://dep.debian.net/deps/dep3/ to learn about the format. Here
+are templates for supplementary fields that you might want to add:
+
+Origin: <vendor|upstream|other>, <url of original patch>
+Bug: <url in upstream bugtracker>
+Bug-Debian: https://bugs.debian.org/<bugnumber>
+Bug-Ubuntu: https://launchpad.net/bugs/<bugnumber>
+Forwarded: <no|not-needed|url proving that it has been forwarded>
+Reviewed-By: <name and email of someone who approved the patch>
+Last-Update: 2019-10-31
+
+--- rdup-1.1.15.orig/GNUmakefile.in
++++ rdup-1.1.15/GNUmakefile.in
+@@ -28,7 +28,7 @@ GLIB_CFLAGS=@GLIB_CFLAGS@
+ GLIB_LIBS=@GLIB_LIBS@
+ LIBS=@LIBS@
+ DEBUG=@DEBUG@
+-CFLAGS=-Wall -W -Werror @CFLAGS@ @DEFS@ -DLOCALEROOTDIR=\"@localedir@\" -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -Os -Wpointer-arith -Wstrict-prototypes 
++CFLAGS=-Wall -W @CFLAGS@ @DEFS@ -DLOCALEROOTDIR=\"@localedir@\" -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -Os -Wpointer-arith -Wstrict-prototypes 
+ INSTALL=./install-sh -c
+ INSTALL_DATA=$(INSTALL) -m 644
+ 
diff -Nru rdup-1.1.15/debian/patches/series rdup-1.1.15/debian/patches/series
--- rdup-1.1.15/debian/patches/series	2017-01-07 22:58:37.000000000 +0000
+++ rdup-1.1.15/debian/patches/series	2019-10-31 17:32:49.000000000 +0000
@@ -1,2 +1,3 @@
 0001-fix-spelling-errors.patch
 0002-fix-manpage-formatting-warning.patch
+0003-no-werror.patch