diff --git a/include/boost/config/compiler/vacpp.hpp b/include/boost/config/compiler/vacpp.hpp
index 165408dd..b526a6b0 100644
--- a/include/boost/config/compiler/vacpp.hpp
+++ b/include/boost/config/compiler/vacpp.hpp
@@ -47,7 +47,7 @@
 #endif
 //
 // last known and checked version is 600:
-#if (__IBMCPP__ > 600)
+#if (__IBMCPP__ > 1010)
 #  if defined(BOOST_ASSERT_CONFIG)
 #     error "Unknown compiler version - please run the configure tests and report the results"
 #  endif