#ifndef BOOST_NUMERIC_INTERVAL_DETAIL_BCC_ROUNDING_CONTROL_HPP
#define BOOST_NUMERIC_INTERVAL_DETAIL_BCC_ROUNDING_CONTROL_HPP
-#ifndef __BORLANDC__
+#if !defined(__BORLANDC__) || defined(__clang__)
# error This header is only intended for Borland C++.
#endif