diff --git a/src/macros/dsl.md b/src/macros/dsl.md
index fb0c23550d..9aaeda34cd 100644
--- a/src/macros/dsl.md
+++ b/src/macros/dsl.md
@@ -10,12 +10,12 @@ an expression and have the output printed to console.
 
 ```rust,editable
 macro_rules! calculate {
-    (eval $e:expr) => {{
+    (eval $e:expr) => {
         {
             let val: usize = $e; // Force types to be integers
             println!("{} = {}", stringify!{$e}, val);
         }
-    }};
+    };
 }
 
 fn main() {