diff --git a/Contractor/Prepare.cpp b/Contractor/Prepare.cpp
index c356aac30..756031779 100644
--- a/Contractor/Prepare.cpp
+++ b/Contractor/Prepare.cpp
@@ -27,7 +27,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "Prepare.h"
 
-#include "Contractor.h"
+#include "contractor.hpp"
 
 #include "../Algorithms/crc32_processor.hpp"
 #include "../DataStructures/DeallocatingVector.h"
diff --git a/Contractor/Contractor.h b/Contractor/contractor.hpp
similarity index 99%
rename from Contractor/Contractor.h
rename to Contractor/contractor.hpp
index 06e2c1139..257dae656 100644
--- a/Contractor/Contractor.h
+++ b/Contractor/contractor.hpp
@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2013, Project OSRM, Dennis Luxen, others
+Copyright (c) 2014, Project OSRM, Dennis Luxen, others
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification,
@@ -25,8 +25,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 */
 
-#ifndef CONTRACTOR_H
-#define CONTRACTOR_H
+#ifndef CONTRACTOR_HPP
+#define CONTRACTOR_HPP
 
 #include "../DataStructures/BinaryHeap.h"
 #include "../DataStructures/DeallocatingVector.h"
@@ -970,4 +970,4 @@ class Contractor
     XORFastHash fast_hash;
 };
 
-#endif // CONTRACTOR_H
+#endif // CONTRACTOR_HPP