diff --git a/src/tests/errors_test/constraint_functor_not_compatible.cpp b/src/tests/errors_test/constraint_functor_not_compatible.cpp
new file mode 100644
index 0000000..96848d5
--- /dev/null
+++ b/src/tests/errors_test/constraint_functor_not_compatible.cpp
@@ -0,0 +1,24 @@
+//
+//  Copyright Mathieu Champlon 2011
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <turtle/mock.hpp>
+
+namespace
+{
+    MOCK_CLASS( my_class )
+    {
+        MOCK_METHOD_EXT( my_method, 0, void( int ), my_method )
+    };
+    bool functor( int, int );
+
+    void test_case()
+    {
+        my_class c;
+        MOCK_EXPECT( c, my_method ).with( &functor );
+    }
+}