diff --git a/src/tests/turtle_test/log_test.cpp b/src/tests/turtle_test/log_test.cpp
index 6de2613..af8add0 100644
--- a/src/tests/turtle_test/log_test.cpp
+++ b/src/tests/turtle_test/log_test.cpp
@@ -561,5 +561,5 @@ BOOST_AUTO_TEST_CASE( mock_detail_template_template_streamable_yields_its_value_
 
 BOOST_AUTO_TEST_CASE( unsigned_char_is_serialized_as_int )
 {
-    BOOST_CHECK_EQUAL( boost::lexical_cast< std::string >( int( 'a' ) ), to_string( unsigned char( 'a' ) ) );
+    BOOST_CHECK_EQUAL( boost::lexical_cast< std::string >( static_cast< int >( 'a' ) ), to_string< unsigned char >( 'a' ) );
 }