diff --git a/vis-lua.c b/vis-lua.c
index f3478863a..d593bdaaa 100644
--- a/vis-lua.c
+++ b/vis-lua.c
@@ -1768,6 +1768,8 @@ static const struct luaL_Reg registers_funcs[] = {
  */
 /***
  * The file being displayed in this window.
+ * Changing the value to a file path will replace the current file with a new
+ * one for the specified path.
  * @tfield File file
  */
 /***