diff --git a/src/command_local.cc b/src/command_local.cc
index 4e2befd4..f81fbace 100644
--- a/src/command_local.cc
+++ b/src/command_local.cc
@@ -165,6 +165,8 @@ initialize_command_local() {
   ADD_COMMAND_VOID("system.hostname",            rak::ptr_fun(&system_hostname));
   ADD_COMMAND_VOID("system.pid",                 rak::ptr_fun(&getpid));
 
+  rpc::commands.call("system.method.insert", rpc::create_object_list("system.file_allocate", "value", (int64_t)0));
+
   ADD_COMMAND_VOID("system.file_status_cache.size",  rak::make_mem_fun((utils::FileStatusCache::base_type*)control->core()->file_status_cache(), &utils::FileStatusCache::size));
   ADD_COMMAND_VOID("system.file_status_cache.prune", rak::make_mem_fun(control->core()->file_status_cache(), &utils::FileStatusCache::prune));
 
diff --git a/src/core/download_list.cc b/src/core/download_list.cc
index dff39f07..7272397b 100644
--- a/src/core/download_list.cc
+++ b/src/core/download_list.cc
@@ -215,7 +215,12 @@ DownloadList::open_throw(Download* download) {
   if (download->download()->is_open())
     return;
   
-  download->download()->open(download->resume_flags());
+  int openFlags = download->resume_flags();
+
+  if (rpc::call_command_value("system.file_allocate"))
+    openFlags |= torrent::Download::open_enable_fallocate;
+
+  download->download()->open(openFlags);
   rpc::commands.call_catch("event.download.opened", rpc::make_target(download), torrent::Object(), "Download event action failed: ");
 }