diff --git a/compiler/rustc_data_structures/src/lib.rs b/compiler/rustc_data_structures/src/lib.rs
index 7669b78834c3f..50a3c85e98aa3 100644
--- a/compiler/rustc_data_structures/src/lib.rs
+++ b/compiler/rustc_data_structures/src/lib.rs
@@ -47,9 +47,9 @@ pub fn cold_path<F: FnOnce() -> R, R>(f: F) -> R {
 #[macro_export]
 macro_rules! likely {
     ($e:expr) => {
-        #[allow(unused_unsafe)]
-        {
-            unsafe { std::intrinsics::likely($e) }
+        match $e {
+            #[allow(unused_unsafe)]
+            e => unsafe { std::intrinsics::likely(e) },
         }
     };
 }
@@ -57,9 +57,9 @@ macro_rules! likely {
 #[macro_export]
 macro_rules! unlikely {
     ($e:expr) => {
-        #[allow(unused_unsafe)]
-        {
-            unsafe { std::intrinsics::unlikely($e) }
+        match $e {
+            #[allow(unused_unsafe)]
+            e => unsafe { std::intrinsics::unlikely(e) },
         }
     };
 }