1 files changed, 1 insertions, 1 deletions

diff --git a/include/plist/Dictionary.h b/include/plist/Dictionary.h
index 931a569..a3ac3a7 100644
--- a/include/plist/Dictionary.h
+++ b/include/plist/Dictionary.h
@@ -35,7 +35,7 @@ public :
     Dictionary(Node* parent = NULL);
     Dictionary(plist_t node, Node* parent = NULL);
     Dictionary(const Dictionary& d);
-    Dictionary& operator=(Dictionary& d);
+    Dictionary& operator=(const Dictionary& d);
     virtual ~Dictionary();
 
     Node* Clone() const;