diff --git a/rewriter/src/rewrite.rs b/rewriter/src/rewrite.rs
index ccf0817..10731f5 100644
--- a/rewriter/src/rewrite.rs
+++ b/rewriter/src/rewrite.rs
@@ -445,7 +445,7 @@ pub fn rewrite(js: &str, url: Url, config: Config) -> Vec<u8> {
 
 				buffer.extend_from_slice(
 					format!(
-						"((t)=>$scramjet$tryset({},\"{}\",t)||{}{}t)({})",
+						"((t)=>$scramjet$tryset({},\"{}\",t)||({}{}t))({})",
 						name,
 						fmt_op(*op),
 						name,