--- Source/WTF/wtf/FastMalloc.cpp.orig	2015-01-07 16:04:31.000000000 -0800
+++ Source/WTF/wtf/FastMalloc.cpp	2015-01-07 16:06:05.000000000 -0800
@@ -5095,8 +5095,13 @@ void* FastMallocZone::zoneRealloc(malloc
 extern "C" {
 malloc_introspection_t jscore_fastmalloc_introspection = { &FastMallocZone::enumerate, &FastMallocZone::goodSize, &FastMallocZone::check, &FastMallocZone::print,
     &FastMallocZone::log, &FastMallocZone::forceLock, &FastMallocZone::forceUnlock, &FastMallocZone::statistics
+
+#if OS(IOS) || __MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
     , 0 // zone_locked will not be called on the zone unless it advertises itself as version five or higher.
+#endif
+#if OS(IOS) || __MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
     , 0, 0, 0, 0 // These members will not be used unless the zone advertises itself as version seven or higher.
+#endif
 
     };
 }