diff --git a/include/ucore/utils.h b/include/ucore/utils.h
index 4a3e199..44511ff 100644
--- a/include/ucore/utils.h
+++ b/include/ucore/utils.h
@@ -103,7 +103,7 @@ const typeof( ((const type *)0)->member ) *__mptr = (ptr);    \
  * @param y denominator
  * @return x rounded up to nearest multiple of y
  */
-#define UC_ROUND_UP(x, y) (UC_DIV_ROUND_UP(x, y) * (y)) 
+#define UC_ROUND_UP(x, y) (UC_DIV_ROUND_UP((x), (y)) * (y)) 
 
 /**
  * Round x down to nearest multiple of y