--- a/mono/sgen/sgen-archdep.h 2016-10-10 11:22:26.607082785 -0500
+++ b/mono/sgen/sgen-archdep.h 2016-10-10 11:22:48.526184527 -0500
@@ -45,6 +45,8 @@
#elif defined(TARGET_ARM64)
+#define ARCH_MIN_MS_BLOCK_SIZE (64*1024)
+#define ARCH_MIN_MS_BLOCK_SIZE_SHIFT 16
#if defined(__APPLE__)
#define REDZONE_SIZE 128
#else