diff --git a/Number_types/include/CGAL/boost_mp.h b/Number_types/include/CGAL/boost_mp.h
index cd55ea3c4a5..59e8e9d2d63 100644
--- a/Number_types/include/CGAL/boost_mp.h
+++ b/Number_types/include/CGAL/boost_mp.h
@@ -18,9 +18,10 @@
 // It is easier to disable this number type completely for old versions.
 // Before 1.63, I/O is broken.  Again, disabling the whole file is just the
 // easy solution.
-// TODO: MSVC has trouble with versions <= 1.69, reenable once 1.70 has been
-// tested. https://github.com/boostorg/multiprecision/issues/98
-#if !defined CGAL_DISABLE_GMP && !defined CGAL_DO_NOT_USE_BOOST_MP && BOOST_VERSION >= 106300 && !defined _MSC_VER
+// MSVC had trouble with versions <= 1.69:
+// https://github.com/boostorg/multiprecision/issues/98
+#if !defined CGAL_DISABLE_GMP && !defined CGAL_DO_NOT_USE_BOOST_MP && \
+    BOOST_VERSION >= 106300 && (!defined _MSC_VER || BOOST_VERSION >= 107000)
 #define CGAL_USE_BOOST_MP 1
 
 #include <CGAL/functional.h> // *ary_function