diff --git a/src/mimefactory.rs b/src/mimefactory.rs
index ef9b4a44c..448c81ba1 100644
--- a/src/mimefactory.rs
+++ b/src/mimefactory.rs
@@ -401,7 +401,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
         ));
         unprotected_headers.push(Header::new("Chat-Version".to_string(), "1.0".to_string()));
 
-        if let Loaded::MDN = self.loaded {
+        if let Loaded::MDN { .. } = self.loaded {
             unprotected_headers.push(Header::new(
                 "Auto-Submitted".to_string(),
                 "auto-replied".to_string(),