diff --git a/Lua-General-Functions.md b/Lua-General-Functions.md
index 69c6d08..1e46518 100644
--- a/Lua-General-Functions.md
+++ b/Lua-General-Functions.md
@@ -167,6 +167,7 @@ Void clear_opcode(Integer opcode); -- removes the internal opcode handler for th
 Bool enable_recipe(Integer recipe_id);
 Bool disable_recipe(Integer recipe_id);
 Void clear_npctype_cache(Integer npctype_id);
+Real clock();
 ```
 
 SpawnPointOptions is a lua table that accepts the following values: