diff --git a/include/boost/config/compiler/vacpp.hpp b/include/boost/config/compiler/vacpp.hpp
index 2410d5a3..9792e00e 100644
--- a/include/boost/config/compiler/vacpp.hpp
+++ b/include/boost/config/compiler/vacpp.hpp
@@ -53,8 +53,8 @@
 #error "Compiler not supported or configured - please reconfigure"
 #endif
 //
-// last known and checked version is 1110:
-#if (__IBMCPP__ > 1110)
+// last known and checked version is 1210:
+#if (__IBMCPP__ > 1210)
 #  if defined(BOOST_ASSERT_CONFIG)
 #     error "Unknown compiler version - please run the configure tests and report the results"
 #  endif