diff --git a/crates/mbe/src/expander/matcher.rs b/crates/mbe/src/expander/matcher.rs
index 3636979d007..621ff791d4f 100644
--- a/crates/mbe/src/expander/matcher.rs
+++ b/crates/mbe/src/expander/matcher.rs
@@ -695,7 +695,11 @@ fn match_meta_var(kind: &str, input: &mut TtIter) -> ExpandResult