diff -r a528509c992b -r 083fde3b838e src/share/vm/runtime/globals.hpp
--- a/src/share/vm/runtime/globals.hpp	Thu Jul 15 08:54:48 2010 -0700
+++ b/src/share/vm/runtime/globals.hpp	Thu Jul 15 18:40:45 2010 -0700
@@ -3517,6 +3517,9 @@
   experimental(bool, EnableInvokeDynamic, false,                            \
           "recognize the invokedynamic instruction")                        \
                                                                             \
+  experimental(bool, AllowTransitionalJSR292, true,                         \
+          "recognize pre-PFD formats of invokedynamic")                     \
+                                                                            \
   develop(bool, TraceInvokeDynamic, false,                                  \
           "trace internal invoke dynamic operations")                       \
                                                                             \