diff --git a/app/lib/cplex.cpp b/app/lib/cplex.cpp
index eadea8a1..1b45d493 100644
--- a/app/lib/cplex.cpp
+++ b/app/lib/cplex.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015 Carsten Larsen
+ * Copyright (c) 2015-2016 Carsten Sonne Larsen
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -24,6 +24,7 @@
  *
  */
 
+#include "clib.h"
 #include "math.h"
 #include "complex.h"
 #include "lib/real.h"