diff --git a/preface.asciidoc b/preface.asciidoc
index f17e2d10..8b8428d7 100644
--- a/preface.asciidoc
+++ b/preface.asciidoc
@@ -221,4 +221,4 @@ Following is a list of notable GitHub contributors, including their GitHub ID in
 * wintercooled
 * wjx
 * Wojciech Langiewicz (wlk)
-* yurigeorgiev4
+* yurigeorgiev4((("", startref="acknowledge0")))