diff --git a/librhash/byte_order.h b/librhash/byte_order.h
index b4e44b1..fab3630 100644
--- a/librhash/byte_order.h
+++ b/librhash/byte_order.h
@@ -62,7 +62,7 @@ extern "C" {
 #elif defined(CPU_IA32) || defined(CPU_X64) || defined(__ia64) || defined(__ia64__) || \
       defined(__alpha__) || defined(_M_ALPHA) || defined(vax) || defined(MIPSEL) || \
       defined(_ARM_) || defined(__arm__) || defined(_M_ARM64) || defined(_M_ARM64EC) || \
-      defined(__loongarch64)
+      defined(__loongarch64) || defined(__sw_64)
 #  define RHASH_BYTE_ORDER RHASH_BYTE_ORDER_LE
 #elif defined(__sparc) || defined(__sparc__) || defined(sparc) || \
       defined(_ARCH_PPC) || defined(_ARCH_PPC64) || defined(_POWER) || \