diff --git a/doc/lua_api.txt b/doc/lua_api.txt
index e7ef32274..6bd0e47a1 100644
--- a/doc/lua_api.txt
+++ b/doc/lua_api.txt
@@ -4859,7 +4859,7 @@ Call these functions only at load time!
     * Called when an incoming mod channel message is received
     * You should have joined some channels to receive events.
     * If message comes from a server mod, `sender` field is an empty string.
-* `minetest.register_on_liquid_transformed(function(post_list, node_list))`
+* `minetest.register_on_liquid_transformed(function(pos_list, node_list))`
     * Called after liquid nodes are modified by the engine's liquid transformation
       process.
     * `pos_list` is an array of all modified positions.