diff --git a/ot-keys/riscv64.patch b/ot-keys/riscv64.patch
new file mode 100644
index 000000000..b1539f75b
--- /dev/null
+++ b/ot-keys/riscv64.patch
@@ -0,0 +1,13 @@
+diff --git PKGBUILD PKGBUILD
+index 782f73f..8667881 100644
+--- PKGBUILD
++++ PKGBUILD
+@@ -45,7 +45,7 @@ b2sums=('705b1da1c587118e11a4554f5abca7105210ad73656d27cc478fee2534830331a429bfd
+ 
+ prepare() {
+   # download dependencies
+-  cargo fetch --locked --target "$(rustc -vV | sed -n 's/host: //p')"
++  cargo fetch --locked --target ${CARCH}gc-unknown-linux-gnu
+ }
+ 
+ build() {