--- old/src/share/vm/runtime/arguments.cpp	2012-12-19 13:29:08.000000000 +0100
+++ new/src/share/vm/runtime/arguments.cpp	2012-12-19 13:29:08.000000000 +0100
@@ -1793,6 +1793,10 @@
     // set up UseSerialGC properly, so that can't be used in the check here.
     warning("Using the ParNew young collector with the Serial old collector is deprecated");
   }
+
+  if (CMSIncrementalMode) {
+    warning("Using incremental CMS is deprecated");
+  }
 }
 
 // Check stack pages settings