--- libmemcached/string.cc.orig	2013-05-13 17:14:22.383125200 +0200
+++ libmemcached/string.cc	2013-05-13 17:14:50.776468746 +0200
@@ -285,7 +285,7 @@
   {
     assert_msg(self, "Invalid memcached_string_st");
     // If we fail at adding the null, we copy and move on
-    if (memcached_success(memcached_string_append_null(self)))
+    if (memcached_failed(memcached_string_append_null(self)))
     {
       return memcached_string_c_copy(self);
     }