diff --git a/src/metadata/error.rs b/src/metadata/error.rs
index 8414955a..523031b2 100644
--- a/src/metadata/error.rs
+++ b/src/metadata/error.rs
@@ -341,7 +341,7 @@ impl YamlMergeKeyError {
                 yaml = yaml.split_off(index);
             }
         } else {
-            yaml = format!("{yaml:?}");
+            yaml = format!("{unmarked_yaml:?}");
         }
 
         YamlMergeKeyError {