diff --git a/OgreMain/include/OgrePlatform.h b/OgreMain/include/OgrePlatform.h
index 4a7b4b7..1434c8b 100644
--- a/OgreMain/include/OgrePlatform.h
+++ b/OgreMain/include/OgrePlatform.h
@@ -166,7 +166,8 @@ namespace Ogre {
 #endif
 
     /* Find the arch type */
-#if defined(__x86_64__) || defined(_M_X64) || defined(__powerpc64__) || defined(__alpha__) || defined(__ia64__) || defined(__s390__) || defined(__s390x__) || defined(__arm64__) || defined(__aarch64__) || defined(__mips64) || defined(__mips64_)
+#if defined(__x86_64__) || defined(_M_X64) || defined(__powerpc64__) || defined(__alpha__) || defined(__ia64__) || defined(__s390__) || defined(__s390x__) || defined(__arm64__) || defined(__aarch64__) || defined(__mips64) || defined(__mips64_) \
+    || (defined(__riscv) && __riscv_xlen == 64)
 #   define OGRE_ARCH_TYPE OGRE_ARCHITECTURE_64
 #else
 #   define OGRE_ARCH_TYPE OGRE_ARCHITECTURE_32