diff --git a/include/boost/pending/integer_log2.hpp b/include/boost/pending/integer_log2.hpp
index f85847b..15fd8b5 100644
--- a/include/boost/pending/integer_log2.hpp
+++ b/include/boost/pending/integer_log2.hpp
@@ -19,8 +19,10 @@
 #ifndef BOOST_INTEGER_LOG2_HPP_GP_20030301
 #define BOOST_INTEGER_LOG2_HPP_GP_20030301
 
-#include <cassert>
-#include <climits> // actually used for Borland only
+#include <assert.h>
+#ifdef __BORLANDC__
+#include <climits>
+#endif
 #include "boost/limits.hpp"
 #include "boost/config.hpp"