diff --git a/include/boost/function.hpp b/include/boost/function.hpp
index 90336b1..1a5cca2 100644
--- a/include/boost/function.hpp
+++ b/include/boost/function.hpp
@@ -22,7 +22,7 @@
 #include <boost/function/detail/prologue.hpp>
 
 // Visual Age C++ doesn't handle the file iteration well
-#if BOOST_WORKAROUND(__IBMCPP__, <= 600)
+#if BOOST_WORKAROUND(__IBMCPP__, >= 500)
 #  if BOOST_FUNCTION_MAX_ARGS >= 0
 #    include <boost/function/function0.hpp>
 #  endif