diff --git a/src/ai/configuration.cpp b/src/ai/configuration.cpp
index 417c5e5151a3..3be0bcfa8bd3 100644
--- a/src/ai/configuration.cpp
+++ b/src/ai/configuration.cpp
@@ -256,7 +256,7 @@ bool configuration::parse_side_config(side_number side, const config& original_c
 
 }
 
-static const std::set<std::string> non_aspect_attributes {"turns", "time_of_day", "engine", "ai_algorithm", "id", "description"};
+static const std::set<std::string> non_aspect_attributes {"turns", "time_of_day", "engine", "ai_algorithm", "id", "description", "hidden"};
 static const std::set<std::string> just_copy_tags {"engine", "stage", "aspect", "goal", "modify_ai"};
 static const std::set<std::string> old_goal_tags {"target", "target_location", "protect_unit", "protect_location"};