diff --git a/fwknop/0000-fix-unknown-command.patch b/fwknop/0000-fix-unknown-command.patch
new file mode 100644
index 000000000..b6dd1240a
--- /dev/null
+++ b/fwknop/0000-fix-unknown-command.patch
@@ -0,0 +1,12 @@
+--- doc/libfko.texi	2021-11-25 21:48:55.888957565 +0800
++++ doc/libfko.texi	2021-11-25 21:50:19.738958709 +0800
+@@ -4,9 +4,6 @@
+ @include version.texi
+ @settitle Firewall Knock Operator Library - libfko
+ @c @setchapternewpage odd
+-@ifnothtml
+-@setcontentsaftertitlepage
+-@end ifnothtml
+ @finalout
+ @c Unify some of the indices.
+ @syncodeindex tp fn
diff --git a/fwknop/riscv64.patch b/fwknop/riscv64.patch
new file mode 100644
index 000000000..95d08bcd9
--- /dev/null
+++ b/fwknop/riscv64.patch
@@ -0,0 +1,27 @@
+--- PKGBUILD
++++ PKGBUILD
+@@ -17,12 +17,22 @@ backup=(etc/${pkgname}/access.conf
+         etc/${pkgname}/fwknopd.conf)
+ depends=('gpgme' 'iptables' 'libpcap' 'wget')
+ source=(https://cipherdyne.org/fwknop/download/fwknop-${pkgver}.tar.bz2{,.asc}
+-        fwknopd.service)
++        fwknopd.service
++        0000-fix-unknown-command.patch)
+ sha512sums=('3fe0a7c673ebe3d417da9bf8e3c9a882181391ecc64d9f67e77e00a56f9f7bcec2c6d94dc51a5ee77a6c64a89f032a865dd304f1cb8ebb359580c70dc0cd374f'
+             'SKIP'
+-            'a171682a054495bb10315e98a300ddbe4adf1f653b719d3344ecb6cfb8ccd15043cffbbd28304c4f15569a12ddcd9733409448d596f0c706e48d4fda2c877a6a')
++            'a171682a054495bb10315e98a300ddbe4adf1f653b719d3344ecb6cfb8ccd15043cffbbd28304c4f15569a12ddcd9733409448d596f0c706e48d4fda2c877a6a'
++            'f7d3a44679d0c1d0eb1cc67d7a81b980225e57b6fe7de51aab2f996e508a2bf88ce167b97ebc682373074f9d29835b567dc20200187dfe4b602ff58d0dc9f093')
+ validpgpkeys=('4D6644A9DA036904BDA2CB90E6C9E3350D3E7410') # Michael Rash (Signing key for cipherdyne.org projects) <mbr@cipherdyne.org>
+ 
++prepare() {
++  cd ${pkgname}-${pkgver}
++
++  # setcontentsaftertitlepage is deprecated, ref: https://www.gnu.org/software/texinfo/manual/texinfo/html_node/Obsolete-_0040_002dCommands.html
++  # see-also: https://www.mail-archive.com/m4-patches@gnu.org/msg01151.html
++  patch -p0 -i ../0000-fix-unknown-command.patch
++}
++
+ build() {
+   cd ${pkgname}-${pkgver}
+   CFLAGS+=' -fcommon' # https://wiki.gentoo.org/wiki/Gcc_10_porting_notes/fno_common