diff --git a/src/autoreplace.cpp b/src/autoreplace.cpp
--- a/src/autoreplace.cpp
+++ b/src/autoreplace.cpp
@@ -15,6 +15,7 @@
 #include "autoreplace_base.h"
 #include "core/pool_func.hpp"
 
+/** The pool of autoreplace "orders". */
 EngineRenewPool _enginerenew_pool("EngineRenew");
 INSTANTIATE_POOL_METHODS(EngineRenew)