diff --git a/src/inline.rs b/src/inline.rs
index de9356a..d7f9d91 100644
--- a/src/inline.rs
+++ b/src/inline.rs
@@ -591,7 +591,7 @@ enum Delim {
     Insert,
 }
 
-#[derive(Clone, Copy)]
+#[derive(Debug, Clone, Copy)]
 enum Dir {
     Open,
     Close,