diff --git a/components/salsa-macro-rules/src/setup_tracked_fn.rs b/components/salsa-macro-rules/src/setup_tracked_fn.rs
index b6182241..79ec96d5 100644
--- a/components/salsa-macro-rules/src/setup_tracked_fn.rs
+++ b/components/salsa-macro-rules/src/setup_tracked_fn.rs
@@ -283,7 +283,9 @@ macro_rules! setup_tracked_fn {
                 }
             })
         }
-
+        // The struct needs be last in the macro expansion in order to make the tracked
+        // function's ident be identified as a function, not a struct, during semantic highlighting.
+        // for more details, see https://github.com/salsa-rs/salsa/pull/612.
         #[allow(non_camel_case_types)]
         $vis struct $fn_name {
             _priv: std::convert::Infallible,