diff --git a/src/libraries/turtle/check.hpp b/src/libraries/turtle/check.hpp
index 12a336f..e2474cc 100644
--- a/src/libraries/turtle/check.hpp
+++ b/src/libraries/turtle/check.hpp
@@ -14,7 +14,6 @@
 #include "operators.hpp"
 #include "log.hpp"
 #include <boost/utility/enable_if.hpp>
-#include <boost/concept_check.hpp>
 #include <boost/noncopyable.hpp>
 #include <boost/ref.hpp>
 
@@ -22,42 +21,6 @@ namespace mock
 {
 namespace detail
 {
-    template< typename Functor, typename Actual >
-    struct FunctorCompatible : private boost::noncopyable
-    {
-    public:
-        BOOST_CONCEPT_USAGE( FunctorCompatible )
-        {
-            boost::require_boolean_expr(
-                // if an error is generated by the line below it means
-                // an argument passed to 'with' was of the wrong type
-                functor_accepts( actual_argument_type )
-            );
-        }
-    private:
-        FunctorCompatible( int ) {}
-        Functor functor_accepts;
-        Actual actual_argument_type;
-    };
-
-    template< typename Expected, typename Actual >
-    struct EqualityComparable : private boost::noncopyable
-    {
-    public:
-        BOOST_CONCEPT_USAGE( EqualityComparable )
-        {
-            boost::require_boolean_expr(
-                // if an error is generated by the line below it means
-                // an argument passed to 'with' was of the wrong type
-                actual_argument_type == expected_argument_type
-            );
-        }
-    private:
-        EqualityComparable( int ) {}
-        Expected expected_argument_type;
-        Actual actual_argument_type;
-    };
-
     template< typename Actual >
     class check_base : boost::noncopyable
     {
@@ -81,12 +44,7 @@ namespace detail
     public:
         explicit check( Expected expected )
             : expected_( expected )
-        {
-            BOOST_CONCEPT_ASSERT(( EqualityComparable<
-                BOOST_DEDUCED_TYPENAME
-                    boost::unwrap_reference< Expected >::type,
-                Actual > ));
-        }
+        {}
     private:
         virtual bool operator()( Actual actual )
         {
@@ -107,9 +65,7 @@ namespace detail
     public:
         explicit check( const constraint< Constraint >& c )
             : c_( c.f_ )
-        {
-            BOOST_CONCEPT_ASSERT(( FunctorCompatible< Constraint, Actual > ));
-        }
+        {}
     private:
         virtual bool operator()( Actual actual )
         {
@@ -133,9 +89,7 @@ namespace detail
     public:
         explicit check( const Functor& f )
             : f_( f )
-        {
-            BOOST_CONCEPT_ASSERT(( FunctorCompatible< Functor, Actual > ));
-        }
+        {}
     private:
         virtual bool operator()( Actual actual )
         {
diff --git a/src/tests/pch_test/pch_test.h b/src/tests/pch_test/pch_test.h
index 5174153..bb51d69 100644
--- a/src/tests/pch_test/pch_test.h
+++ b/src/tests/pch_test/pch_test.h
@@ -11,7 +11,6 @@
 //#include <boost/spirit/home/phoenix/core/nothing.hpp>
 //#include <boost/spirit/home/phoenix/bind.hpp>
 //#include <boost/function.hpp>
-//#include <boost/concept_check.hpp>
 //#include <boost/bind.hpp>
 //#include <boost/test/test_tools.hpp>
 //#include <boost/test/unit_test_suite.hpp>