diff --git a/radvd-werror.patch b/radvd-werror.patch
new file mode 100644
index 0000000..e2a792c
--- /dev/null
+++ b/radvd-werror.patch
@@ -0,0 +1,12 @@
+diff --git a/gram.y b/gram.y
+index 1c74c9d..b1d675c 100644
+--- a/gram.y
++++ b/gram.y
+@@ -408,7 +408,6 @@ v6addrlist_rasrcaddress	: IPV6ADDR ';'
+ prefixdef	: prefixhead optional_prefixplist ';'
+ 		{
+ 			if (prefix) {
+-				unsigned int dst;
+ 
+ 				if (prefix->AdvPreferredLifetime > prefix->AdvValidLifetime)
+ 				{
diff --git a/radvd.spec b/radvd.spec
index eef9336..32aaca3 100644
--- a/radvd.spec
+++ b/radvd.spec
@@ -1,7 +1,7 @@
 Summary: A Router Advertisement daemon
 Name: radvd
 Version: 2.17
-Release: 10%{?dist}
+Release: 11%{?dist}
 # The code includes the advertising clause, so it's GPL-incompatible
 License: BSD with advertising
 Group: System Environment/Daemons
@@ -9,6 +9,8 @@ URL: http://www.litech.org/radvd/
 Source0: %{url}dist/%{name}-%{version}.tar.xz
 Source1: radvd-tmpfs.conf
 Source2: radvd.service
+## https://github.com/reubenhwk/radvd/commit/6e45acbf3d64b9bd945adcb3de622fd7d059ceb9.patch
+Patch0: radvd-werror.patch
 
 BuildRequires: gcc
 BuildRequires: bison
@@ -33,6 +35,7 @@ services.
 
 %prep
 %setup -q
+%patch0 -p1 -b .werror
 
 for F in CHANGES; do
     iconv -f iso-8859-1 -t utf-8 < "$F" > "${F}.new"
@@ -41,7 +44,7 @@ for F in CHANGES; do
 done
 
 %build
-export CFLAGS="$RPM_OPT_FLAGS -fPIE" 
+export CFLAGS="$RPM_OPT_FLAGS -fPIE -Werror=all" 
 export LDFLAGS='-pie -Wl,-z,relro,-z,now,-z,noexecstack,-z,nodlopen'
 %configure \
     --disable-silent-rules \
@@ -95,6 +98,9 @@ exit 0
 %{_sbindir}/radvdump
 
 %changelog
+* Thu Apr 12 2018 Pavel Zhukov <pzhukov@redhat.com> - 2.17-11
+- Enable Werror=all
+
 * Mon Feb 19 2018 Pavel Zhukov <pzhukov@redhat.com> - 2.17-10
 - Add gcc BR