diff --git a/include/boost/program_options/detail/utf8_codecvt_facet.hpp b/include/boost/program_options/detail/utf8_codecvt_facet.hpp
index 59fe55c..b651e64 100644
--- a/include/boost/program_options/detail/utf8_codecvt_facet.hpp
+++ b/include/boost/program_options/detail/utf8_codecvt_facet.hpp
@@ -146,7 +146,11 @@ protected:
         const char * from,
         const char * from_end, 
         std::size_t max_limit
-    ) const;
+#if BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600))
+        ) const throw();
+#else
+        ) const;
+#endif
 
     // Largest possible value do_length(state,from,from_end,1) could return.
     virtual int do_max_length() const throw () {
diff --git a/src/utf8_codecvt_facet.cpp b/src/utf8_codecvt_facet.cpp
index 3a1a051..ba9199c 100644
--- a/src/utf8_codecvt_facet.cpp
+++ b/src/utf8_codecvt_facet.cpp
@@ -172,7 +172,11 @@ int utf8_codecvt_facet_wchar_t::do_length(
     const char * from,
     const char * from_end, 
     std::size_t max_limit
+#if BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600))
+) const throw()
+#else
 ) const
+#endif
 { 
     // RG - this code is confusing!  I need a better way to express it.
     // and test cases.