diff --git a/lib/compiler-rt/builtins/int_types.h b/lib/compiler-rt/builtins/int_types.h
index 7a72de4..e94d315 100644
--- a/lib/compiler-rt/builtins/int_types.h
+++ b/lib/compiler-rt/builtins/int_types.h
@@ -64,7 +64,7 @@
 } udwords;
 
 #if defined(__LP64__) || defined(__wasm__) || defined(__mips64) ||             \
-    defined(__riscv) || defined(_WIN64)
+    defined(__SIZEOF_INT128__) || defined(_WIN64)
 #define CRT_HAS_128BIT
 #endif