foo.diff

diff --git a/hphp/runtime/ext/memcached/ext_memcached.cpp b/hphp/runtime/ext/memcached/ext_memcached.cpp
index 4300861..ecfa56d 100644
--- a/hphp/runtime/ext/memcached/ext_memcached.cpp
+++ b/hphp/runtime/ext/memcached/ext_memcached.cpp
@@ -93,8 +93,10 @@ const int64_t q_Memcached$$DISTRIBUTION_CONSISTENT
           = MEMCACHED_DISTRIBUTION_CONSISTENT;
 const int64_t q_Memcached$$DISTRIBUTION_CONSISTENT_KETAMA
           = MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
+#ifdef MEMCACHED_DISTRIBUTION_CONSISTENT_WEIGHTED
 const int64_t q_Memcached$$DISTRIBUTION_CONSISTENT_WEIGHTED
           = MEMCACHED_DISTRIBUTION_CONSISTENT_WEIGHTED;
+#endif
 const int64_t q_Memcached$$OPT_LIBKETAMA_COMPATIBLE
           = MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED;
 const int64_t q_Memcached$$OPT_BUFFER_WRITES
@@ -1208,7 +1210,9 @@ IMPLEMENT_THREAD_LOCAL(MemcachedData::ImplMap, MemcachedData::s_persistentMap);
 const StaticString s_Memcached("Memcached");
 const StaticString s_DISTRIBUTION_CONSISTENT("DISTRIBUTION_CONSISTENT");
 const StaticString s_DISTRIBUTION_CONSISTENT_KETAMA("DISTRIBUTION_CONSISTENT_KETAMA");
+#ifdef MEMCACHED_DISTRIBUTION_CONSISTENT_WEIGHTED
 const StaticString s_DISTRIBUTION_CONSISTENT_WEIGHTED("DISTRIBUTION_CONSISTENT_WEIGHTED");
+#endif
 const StaticString s_DISTRIBUTION_MODULA("DISTRIBUTION_MODULA");
 const StaticString s_GET_PRESERVE_ORDER("GET_PRESERVE_ORDER");
 const StaticString s_HASH_CRC("HASH_CRC");
@@ -1332,10 +1336,12 @@ class MemcachedExtension : public Extension {
       s_Memcached.get(), s_DISTRIBUTION_CONSISTENT_KETAMA.get(),
       q_Memcached$$DISTRIBUTION_CONSISTENT_KETAMA
     );
+#ifdef MEMCACHED_DISTRIBUTION_CONSISTENT_WEIGHTED
     Native::registerClassConstant<KindOfInt64>(
       s_Memcached.get(), s_DISTRIBUTION_CONSISTENT_WEIGHTED.get(),
       q_Memcached$$DISTRIBUTION_CONSISTENT_WEIGHTED
     );
+#endif
     Native::registerClassConstant<KindOfInt64>(
       s_Memcached.get(), s_DISTRIBUTION_MODULA.get(),
       q_Memcached$$DISTRIBUTION_MODULA
diff --git a/hphp/test/slow/ext_memcached/ketama_opt.php.skipif b/hphp/test/slow/ext_memcached/ketama_opt.php.skipif
new file mode 100644
index 0000000..e3b27f7
--- /dev/null
+++ b/hphp/test/slow/ext_memcached/ketama_opt.php.skipif
@@ -0,0 +1,7 @@
+<?php
+
+$memc = new Memcached();
+$refl = new ReflectionClass($memc);
+if ($refl->getConstant('DISTRIBUTION_CONSISTENT_WEIGHTED') === false) {
+  echo "SKIP Memcached::DISTRIBUTION_CONSISTENT_WEIGHTED not defined";
+}