diff --git a/include/boost/smart_ptr/bad_weak_ptr.hpp b/include/boost/smart_ptr/bad_weak_ptr.hpp
index 582fad8..b086be5 100644
--- a/include/boost/smart_ptr/bad_weak_ptr.hpp
+++ b/include/boost/smart_ptr/bad_weak_ptr.hpp
@@ -17,6 +17,7 @@
 // http://www.boost.org/LICENSE_1_0.txt)
 //
 
+#include <boost/config.hpp>
 #include <exception>
 
 #ifdef __BORLANDC__
@@ -36,7 +37,8 @@ namespace boost
 # pragma option push -pc
 #endif
 
-#if defined(__clang__)
+#if defined(BOOST_CLANG)
+// Intel C++ on Mac defines __clang__ but doesn't support the pragma
 # pragma clang diagnostic push
 # pragma clang diagnostic ignored "-Wweak-vtables"
 #endif
@@ -51,7 +53,7 @@ public:
     }
 };
 
-#if defined(__clang__)
+#if defined(BOOST_CLANG)
 # pragma clang diagnostic pop
 #endif