diff --git a/python-webrtcvad/add-riscv64-build.patch b/python-webrtcvad/add-riscv64-build.patch
new file mode 100644
index 000000000..d04abcfb7
--- /dev/null
+++ b/python-webrtcvad/add-riscv64-build.patch
@@ -0,0 +1,18 @@
+diff --git a/cbits/webrtc/typedefs.h b/cbits/webrtc/typedefs.h
+index 51d8992..c6c3347 100644
+--- a/cbits/webrtc/typedefs.h
++++ b/cbits/webrtc/typedefs.h
+@@ -47,6 +47,13 @@
+ #elif defined(__pnacl__)
+ #define WEBRTC_ARCH_32_BITS
+ #define WEBRTC_ARCH_LITTLE_ENDIAN
++#elif defined(__riscv)
++#if (__riscv_xlen == 64)
++#define WEBRTC_ARCH_64_BITS
++#else
++#define WEBRTC_ARCH_32_BITS
++#endif
++#define WEBRTC_ARCH_LITTLE_ENDIAN
+ #else
+ #error Please add support for your architecture in typedefs.h
+ #endif
diff --git a/python-webrtcvad/riscv64.patch b/python-webrtcvad/riscv64.patch
new file mode 100644
index 000000000..9366a71a9
--- /dev/null
+++ b/python-webrtcvad/riscv64.patch
@@ -0,0 +1,20 @@
+--- PKGBUILD
++++ PKGBUILD
+@@ -15,8 +15,15 @@ depends=(
+ )
+ makedepends=(git)
+ _tag=bb429dac1a686807c69b916f03dd843fa10b0927
+-source=(git+https://github.com/wiseman/py-webrtcvad.git#tag=${_tag})
+-b2sums=(SKIP)
++source=(git+https://github.com/wiseman/py-webrtcvad.git#tag=${_tag}
++        add-riscv64-build.patch)
++b2sums=('SKIP'
++        '7b1d6a6173cb50ca84b9339eb36f217fc4ab1cc134760821b7b62741055bae12bc96552a404526a7af03c72bf73835a1d3a20a5f3882a7f35480ba40097fa95a')
++
++prepare() {
++  cd py-webrtcvad
++  patch -Np1 -i ../add-riscv64-build.patch
++}
+ 
+ build() {
+   cd py-webrtcvad