diff --git a/mdadm-4.1-no-Werror.patch b/mdadm-4.1-no-Werror.patch
new file mode 100644
index 0000000..2cdac7c
--- /dev/null
+++ b/mdadm-4.1-no-Werror.patch
@@ -0,0 +1,26 @@
+From: martin f. krafft <madduck@debian.org>
+Subject: Remove -Werror from compiler flags
+
+-Werror seems like a bad idea on released/packaged code because a toolchain
+update (introducing new warnings) could break the build. We'll let upstream
+use it to beautify the code, but remove it for out builds.
+
+Signed-off-by: martin f. krafft <madduck@debian.org>
+
+---
+ Makefile |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+Index: mdadm-4.1/Makefile
+===================================================================
+--- mdadm-4.1.orig/Makefile
++++ mdadm-4.1/Makefile
+@@ -48,7 +48,7 @@ endif
+ 
+ CC ?= $(CROSS_COMPILE)gcc
+ CXFLAGS ?= -ggdb
+-CWFLAGS = -Wall -Werror -Wstrict-prototypes -Wextra -Wno-unused-parameter
++CWFLAGS = -Wall -Wstrict-prototypes -Wextra -Wno-unused-parameter
+ ifdef WARN_UNUSED
+ CWFLAGS += -Wp,-D_FORTIFY_SOURCE=2 -O3
+ endif
diff --git a/mdadm.spec b/mdadm.spec
index d542a42..12a2630 100644
--- a/mdadm.spec
+++ b/mdadm.spec
@@ -1,7 +1,7 @@
 Name:        mdadm
 Version:     4.1
 %define subversion rc2
-Release:     rc2.0.2%{?dist}.1
+Release:     rc2.0.3%{?dist}
 Summary:     The mdadm program controls Linux md devices (software RAID arrays)
 URL:         http://www.kernel.org/pub/linux/utils/raid/mdadm/
 License:     GPLv2+
@@ -16,6 +16,9 @@ Source6:     mdmonitor.service
 Source7:     mdadm.conf
 Source8:     mdadm_event.conf
 
+# Build without -Werror.  From Debian.
+Patch00:     https://sources.debian.org/data/main/m/mdadm/4.1-2/debian/patches/debian-no-Werror.diff#/mdadm-4.1-no-Werror.patch
+
 # Fedora customization patches
 Patch97:     mdadm-3.3-udev.patch
 Patch98:     mdadm-2.5.2-static.patch
@@ -39,6 +42,7 @@ file can be used to help with some common tasks.
 %setup -q -n %{name}-%{version}_%{subversion}
 
 # Fedora customization patches
+%patch00 -p1 -b .no-Werror
 %patch97 -p1 -b .udev
 %patch98 -p1 -b .static
 
@@ -92,6 +96,9 @@ install -m644 %{SOURCE8} %{buildroot}/etc/libreport/events.d
 /etc/libreport/events.d/*
 
 %changelog
+* Sat Mar 16 2019 Björn Esser <besser82@fedoraproject.org> - 4.1-rc2.0.3
+- Add patch to build without -Werror, fixes FTBFS (#1675363)
+
 * Fri Feb 01 2019 Fedora Release Engineering <releng@fedoraproject.org> - 4.1-rc2.0.2.1
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild