diff --git a/webrtc/typedefs.h b/webrtc/typedefs.h
index d875490..ce1f3e8 100644
--- a/webrtc/typedefs.h
+++ b/webrtc/typedefs.h
@@ -26,6 +26,13 @@
 #elif defined(__aarch64__)
 #define WEBRTC_ARCH_64_BITS
 #define WEBRTC_ARCH_LITTLE_ENDIAN
+#elif defined(__riscv) || defined(__riscv__)
+#define WEBRTC_ARCH_LITTLE_ENDIAN
+#if __riscv_xlen == 64
+#define WEBRTC_ARCH_64_BITS
+#else
+#define WEBRTC_ARCH_32_BITS
+#endif
 #elif defined(_M_IX86) || defined(__i386__)
 #define WEBRTC_ARCH_X86_FAMILY
 #define WEBRTC_ARCH_X86