1 files changed, 5 insertions, 4 deletions
diff --git a/src/main/java/org/yaml/snakeyaml/constructor/DuplicateKeyException.java b/src/main/java/org/yaml/snakeyaml/constructor/DuplicateKeyException.java
index dc7198ee..55654ef0 100644
--- a/src/main/java/org/yaml/snakeyaml/constructor/DuplicateKeyException.java
+++ b/src/main/java/org/yaml/snakeyaml/constructor/DuplicateKeyException.java
@@ -19,8 +19,9 @@ import org.yaml.snakeyaml.error.Mark;
 
 public class DuplicateKeyException extends ConstructorException {
 
-    protected DuplicateKeyException(Mark contextMark, Object key,
-                                    Mark problemMark) {
-        super("while constructing a mapping", contextMark, "found duplicate key " + String.valueOf(key), problemMark);
-    }
+  protected DuplicateKeyException(Mark contextMark, Object key,
+      Mark problemMark) {
+    super("while constructing a mapping", contextMark, "found duplicate key " + key,
+        problemMark);
+  }
 }