--- old/src/share/vm/compiler/compilerDirectives.hpp	2016-03-01 14:59:45.550117874 +0100
+++ new/src/share/vm/compiler/compilerDirectives.hpp	2016-03-01 14:59:45.446117870 +0100
@@ -42,6 +42,7 @@
     cflags(PrintAssembly,           bool, PrintAssembly, PrintAssembly) \
     cflags(PrintInlining,           bool, PrintInlining, PrintInlining) \
     cflags(PrintNMethods,           bool, PrintNMethods, PrintNMethods) \
+    cflags(BackgroundCompilation,   bool, BackgroundCompilation, X) \
     cflags(ReplayInline,            bool, false, ReplayInline) \
     cflags(DumpReplay,              bool, false, DumpReplay) \
     cflags(DumpInline,              bool, false, DumpInline) \