diff --git a/crates/swc_fast_ts_strip/src/lib.rs b/crates/swc_fast_ts_strip/src/lib.rs
index 3ac51046b9b4..710595d94ada 100644
--- a/crates/swc_fast_ts_strip/src/lib.rs
+++ b/crates/swc_fast_ts_strip/src/lib.rs
@@ -64,7 +64,7 @@ interface Options {
     module?: boolean;
     filename?: string;
     mode?: Mode;
-    transform?; TransformConfig;
+    transform?: TransformConfig;
     sourceMap?: boolean;
 }