--- old/src/share/vm/gc_implementation/g1/g1_globals.hpp	2014-07-10 17:13:21.274180584 +0200
+++ new/src/share/vm/gc_implementation/g1/g1_globals.hpp	2014-07-10 17:13:21.170180587 +0200
@@ -232,6 +232,9 @@
           "If non-0 is the number of parallel rem set update threads, "     \
           "otherwise the value is determined ergonomically.")               \
                                                                             \
+  product(bool, G1ClassUnloadingEnabled, true,                              \
+          "Whether class unloading is enabled when using G1 GC")            \
+                                                                            \
   develop(bool, G1VerifyCTCleanup, false,                                   \
           "Verify card table cleanup.")                                     \
                                                                             \