diff --git a/parser/src/error.rs b/parser/src/error.rs
index e1dd861..ebec476 100644
--- a/parser/src/error.rs
+++ b/parser/src/error.rs
@@ -52,7 +52,7 @@ impl<'a, F> AstError<'a, F> {
         Err(Self {
             span: pair.as_span(),
             error_code: ErrorCode::AstGenBug,
-            error_message: format!("Possible bug, unimplemented: {:#?}", pair),
+            error_message: format!("Possible bug, unimplemented: {:#?}", pair.as_rule()),
             recovered: None,
         })
     }