diff --git a/internals/src/macros.rs b/internals/src/macros.rs
index 6b9aa6aaf..9a4b57238 100644
--- a/internals/src/macros.rs
+++ b/internals/src/macros.rs
@@ -139,9 +139,9 @@ macro_rules! debug_from_display {
 /// Asserts a boolean expression at compile time.
 #[macro_export]
 macro_rules! const_assert {
-    ($x:expr) => {{
+    ($x:expr) => {
         const _: [(); 0 - !$x as usize] = [];
-    }};
+    };
 }
 
 /// Derives `From<core::convert::Infallible>` for the given type.