diff --git a/rak/error_number.h b/rak/error_number.h
index 400c7989..11402bd9 100644
--- a/rak/error_number.h
+++ b/rak/error_number.h
@@ -53,6 +53,7 @@ public:
   static const int e_noent       = ENOENT;
   static const int e_nomem       = ENOMEM;
   static const int e_notdir      = ENOTDIR;
+  static const int e_isdir       = EISDIR;
   
   static const int e_intr        = EINTR;
 
@@ -73,6 +74,7 @@ public:
 
   static error_number current()                    { return errno; }
   static void         clear_global()               { errno = 0; }
+  static void         set_global(error_number err) { errno = err.m_errno; }
 
   bool operator == (const error_number& e) const   { return m_errno == e.m_errno; }
 
diff --git a/src/option_handler_rules.cc b/src/option_handler_rules.cc
index f91ff5f9..dfa84521 100644
--- a/src/option_handler_rules.cc
+++ b/src/option_handler_rules.cc
@@ -514,6 +514,15 @@ initialize_option_handler(Control* c) {
   variables->insert("timeout_safe_sync",     new utils::VariableValueSlot(rak::mem_fn(torrent::chunk_manager(), &torrent::ChunkManager::timeout_safe_sync),
                                                                           rak::mem_fn(torrent::chunk_manager(), &torrent::ChunkManager::set_timeout_safe_sync)));
 
+  variables->insert("preload_min_pipelined", new utils::VariableValueSlot(rak::mem_fn(torrent::chunk_manager(), &torrent::ChunkManager::preload_min_pipelined),
+                                                                          rak::mem_fn(torrent::chunk_manager(), &torrent::ChunkManager::set_preload_min_pipelined)));
+
+  variables->insert("preload_min_size",      new utils::VariableValueSlot(rak::mem_fn(torrent::chunk_manager(), &torrent::ChunkManager::preload_min_size),
+                                                                          rak::mem_fn(torrent::chunk_manager(), &torrent::ChunkManager::set_preload_min_size)));
+
+  variables->insert("preload_required_rate", new utils::VariableValueSlot(rak::mem_fn(torrent::chunk_manager(), &torrent::ChunkManager::preload_required_rate),
+                                                                          rak::mem_fn(torrent::chunk_manager(), &torrent::ChunkManager::set_preload_required_rate)));
+
   variables->insert("port_range",            new utils::VariableStringSlot(rak::value_fn(std::string()), rak::bind_ptr_fn(&apply_port_range, c)));
 
   variables->insert("hash_read_ahead",       new utils::VariableValueSlot(rak::ptr_fn(torrent::hash_read_ahead), rak::bind_ptr_fn(&apply_hash_read_ahead, c)));