diff --git a/common/arch.h b/common/arch.h
index ccccfa5a..8c2ac1a4 100644
--- a/common/arch.h
+++ b/common/arch.h
@@ -84,7 +84,8 @@ typedef int bool_t;
 #define NEED_ALIGN
 #elif defined(__x86__) || defined(__x86_64__) || \
       defined(__AMD64__) || defined(_M_IX86) || defined (_M_AMD64) || \
-      defined(__i386__) || defined(__aarch64__)
+      defined(__i386__) || defined(__aarch64__) || \
+      defined(__riscv)
 #define NO_NEED_ALIGN
 #else
 #warning unknown arch