diff --git a/files/lua_api/openmw/types.lua b/files/lua_api/openmw/types.lua
index 90c13a7241..98f0398fa9 100644
--- a/files/lua_api/openmw/types.lua
+++ b/files/lua_api/openmw/types.lua
@@ -193,6 +193,7 @@
 -- @function [parent=#ActorActiveEffects] getEffect
 -- @param self
 -- @param string effect ID
+-- @param string Optional skill or attribute ID
 -- @return #ActiveEffect if such an effect is active, nil otherwise
 
 ---