--- a/hotspot/src/cpu/zero/vm/globals_zero.hpp	Mon Nov 02 12:34:27 2015 +0000
+++ b/hotspot/src/cpu/zero/vm/globals_zero.hpp	Tue Nov 03 09:41:03 2015 +0100
@@ -69,6 +69,9 @@
 
 define_pd_global(bool, PreserveFramePointer, false);
 
+// No performance work done here yet.
+define_pd_global(bool, CompactStrings, false);
+
 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint)  \
                                                                             \
   product(bool, UseFastEmptyMethods, true,                                  \