diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index cbd995d..62aa167 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -6622,6 +6622,7 @@
 dialog_gui		Compiled with GUI dialog support.
 diff			Compiled with |vimdiff| and 'diff' support.
 digraphs		Compiled with support for digraphs.
+directx			Compiled with support for Direct-X and 'renderoptions'.
 dnd			Compiled with support for the "~ register |quote_~|.
 dos16			16 bits DOS version of Vim.
 dos32			32 bits DOS (DJGPP) version of Vim.