diff --git a/lib/utils/src/bin.rs b/lib/utils/src/bin.rs
index fd20624..e90d959 100644
--- a/lib/utils/src/bin.rs
+++ b/lib/utils/src/bin.rs
@@ -1,6 +1,6 @@
 #[macro_export]
 macro_rules! MASK {
     ($bits:expr) => {
-        (1 << $bits) - 1
+        ((1 << $bits) - 1)
     };
 }