diff --git a/include/boost/config/compiler/visualc.hpp b/include/boost/config/compiler/visualc.hpp
index 760e2833..f51f0e1d 100644
--- a/include/boost/config/compiler/visualc.hpp
+++ b/include/boost/config/compiler/visualc.hpp
@@ -107,7 +107,7 @@
 //
 // TR1 features:
 //
-#if _MSC_VER >= 1700
+#if (_MSC_VER >= 1700) && defined(_HAS_CXX17) && (_HAS_CXX17 > 0)
 // # define BOOST_HAS_TR1_HASH			// don't know if this is true yet.
 // # define BOOST_HAS_TR1_TYPE_TRAITS	// don't know if this is true yet.
 # define BOOST_HAS_TR1_UNORDERED_MAP