diff --git a/include/boost/config/compiler/vacpp.hpp b/include/boost/config/compiler/vacpp.hpp
index c4ef9f18..6e575db7 100644
--- a/include/boost/config/compiler/vacpp.hpp
+++ b/include/boost/config/compiler/vacpp.hpp
@@ -27,7 +27,7 @@
 #endif
 //
 // last known and checked version is 500:
-#if (__IBMCPP__ > 500)
+#if (__IBMCPP__ > 502)
 #  if defined(BOOST_ASSERT_CONFIG)
 #     error "Unknown compiler version - please run the configure tests and report the results"
 #  endif