1 files changed, 1 insertions, 1 deletions

diff --git a/crates/mbe/src/expander/transcriber.rs b/crates/mbe/src/expander/transcriber.rs
index 49a137577..4894e2a0c 100644
--- a/crates/mbe/src/expander/transcriber.rs
+++ b/crates/mbe/src/expander/transcriber.rs
@@ -241,6 +241,6 @@ fn push_fragment(buf: &mut Vec<tt::TokenTree>, fragment: Fragment) {
 fn push_subtree(buf: &mut Vec<tt::TokenTree>, tt: tt::Subtree) {
     match tt.delimiter {
         None => buf.extend(tt.token_trees),
-        _ => buf.push(tt.into()),
+        Some(_) => buf.push(tt.into()),
     }
 }