1 files changed, 3 insertions, 3 deletions

diff --git a/include/plist/Integer.h b/include/plist/Integer.h
index 86af0dd..adbc39a 100644
--- a/include/plist/Integer.h
+++ b/include/plist/Integer.h
@@ -32,15 +32,15 @@ class Integer : public Node
 public :
     Integer(Node* parent = NULL);
     Integer(plist_t node, Node* parent = NULL);
-    Integer(Integer& i);
+    Integer(const Integer& i);
     Integer& operator=(Integer& i);
     Integer(uint64_t i);
     virtual ~Integer();
 
-    Node* Clone();
+    Node* Clone() const;
 
     void SetValue(uint64_t i);
-    uint64_t GetValue();
+    uint64_t GetValue() const;
 };
 
 };