diff --git a/doc/lua_api.txt b/doc/lua_api.txt
index a03a95d9e..17b311ffd 100644
--- a/doc/lua_api.txt
+++ b/doc/lua_api.txt
@@ -1870,6 +1870,7 @@ Call these functions only at load time!
     * `modifier`: when true, the function should return the actual hp_change.
       Note: modifiers only get a temporary hp_change that can be modified by later modifiers.
       modifiers can return true as a second argument to stop the execution of further functions.
+      Non-modifiers receive the final hp change calculated by the modifiers.
 * `minetest.register_on_respawnplayer(func(ObjectRef))`
      * Called when player is to be respawned
      * Called _before_ repositioning of player occurs