diff --git a/turtle/constraint.hpp b/turtle/constraint.hpp
index 5b5dbd7..a5326e6 100644
--- a/turtle/constraint.hpp
+++ b/turtle/constraint.hpp
@@ -9,6 +9,9 @@
 #ifndef MOCK_CONSTRAINT_HPP_INCLUDED
 #define MOCK_CONSTRAINT_HPP_INCLUDED
 
+#include <boost/preprocessor/stringize.hpp>
+#include "log.hpp"
+
 namespace mock
 {
     template< typename Constraint >
diff --git a/turtle/constraints.hpp b/turtle/constraints.hpp
index fd7ded1..be6fb6c 100644
--- a/turtle/constraints.hpp
+++ b/turtle/constraints.hpp
@@ -10,12 +10,10 @@
 #define MOCK_CONSTRAINTS_HPP_INCLUDED
 
 #include "constraint.hpp"
-#include "log.hpp"
 #include <boost/ref.hpp>
 #include <boost/utility/enable_if.hpp>
 #include <boost/utility/addressof.hpp>
 #include <boost/type_traits/is_convertible.hpp>
-#include <boost/preprocessor/stringize.hpp>
 
 namespace mock
 {