diff --git a/lemon/bits/enable_if.h b/lemon/bits/enable_if.h
--- a/lemon/bits/enable_if.h
+++ b/lemon/bits/enable_if.h
@@ -2,7 +2,7 @@
  *
  * This file is a part of LEMON, a generic C++ optimization library.
  *
- * Copyright (C) 2003-2008
+ * Copyright (C) 2003-2009
  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
  * (Egervary Research Group on Combinatorial Optimization, EGRES).
  *