diff --git a/include/boost/type_index/stl_type_index.hpp b/include/boost/type_index/stl_type_index.hpp
index c801e70..a5add88 100644
--- a/include/boost/type_index/stl_type_index.hpp
+++ b/include/boost/type_index/stl_type_index.hpp
@@ -1,5 +1,5 @@
 //
-// Copyright (c) Antony Polukhin, 2013-2014.
+// Copyright (c) Antony Polukhin, 2013-2015.
 //
 //
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
@@ -200,7 +200,7 @@ inline bool stl_type_index::equal(const stl_type_index& rhs) const BOOST_NOEXCEP
 #ifdef BOOST_CLASSINFO_COMPARE_BY_NAMES
     return raw_name() == rhs.raw_name() || !std::strcmp(raw_name(), rhs.raw_name());
 #else
-    return *data_ == *rhs.data_;
+    return !!(*data_ == *rhs.data_);
 #endif
 }