diff --git a/src/config.cpp b/src/config.cpp
index 0e6dbd03f93..1c398c5ca53 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -571,7 +571,8 @@ config& config::add_child_at_total(config_key_type key, const config &val, size_
 	
 	if(next == end) {
 		config& res = config::add_child(key, val);
-		std::rotate(ordered_children.begin() + pos, ordered_children.end(), ordered_children.end() - 1);
+		//rotate the just inserted element to position pos.
+		std::rotate(ordered_children.begin() + pos, ordered_children.end() - 1, ordered_children.end());
 		return res;
 	}