diff --git a/ChangeLog b/ChangeLog
index d0d038d1..d8828a7e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2026-09-13  Bob Weiner  <rsw@gnu.org>
+
+* hywiki.el (hywiki-word-section-regexp): Fix that character after the
+    '#' section separator cannot be any of these additional characters
+    that were missing: ()<>{}\".  This fixes a bug where 'Wiki#'
+    would be highlighted within: ("Wiki#").
+  test/hywiki-tests.el (hywiki-tests--wikiword-identified-in-emacs-lisp-mode):
+    Add back previously failing test for "WikiWord#".
+
 2026-09-12  Mats Lidell  <matsl@gnu.org>
 
 * hmouse-drv.el (hkey-help-hbut): Make def lexical var.
diff --git a/hywiki.el b/hywiki.el
index 47d99351..bc2fb5ef 100644
--- a/hywiki.el
+++ b/hywiki.el
@@ -3,7 +3,7 @@
 ;; Author:       Bob Weiner
 ;;
 ;; Orig-Date:    21-Apr-24 at 22:41:13
-;; Last-Mod:     11-Sep-26 at 10:58:58 by Bob Weiner
+;; Last-Mod:     13-Sep-26 at 11:21:07 by Bob Weiner
 ;;
 ;; SPDX-License-Identifier: GPL-3.0-or-later
 ;;
@@ -541,7 +541,7 @@ Nil by default."
 Do not use a start or end line/string anchor in this regexp.")
 
 (defconst hywiki-word-section-regexp
-  "\\(#[^][# \t\n\r\f]+\\)"
+  "\\(#[^][#()<>{}\" \t\n\r\f]+\\)"
   "Regexp that matches a non-delimited HyWikiWord #section extension.
 After the first # character, this may contain any non-square-bracket,
 non-# and non-whitespace characters.")
diff --git a/test/hywiki-tests.el b/test/hywiki-tests.el
index 5a149ac0..80e292f4 100644
--- a/test/hywiki-tests.el
+++ b/test/hywiki-tests.el
@@ -3,7 +3,7 @@
 ;; Author:       Mats Lidell
 ;;
 ;; Orig-Date:    18-May-24 at 23:59:48
-;; Last-Mod:     30-Aug-26 at 23:15:25 by Bob Weiner
+;; Last-Mod:     13-Sep-26 at 11:26:36 by Bob Weiner
 ;;
 ;; SPDX-License-Identifier: GPL-3.0-or-later
 ;;
@@ -1808,9 +1808,7 @@ face is verified during the change."
           (should (string= "WikiWord" (hywiki-tests--word-at)))))
 
       ;; Does not highlight as a WikiWord
-      ;; FIXME: "WikiWord#" (with no ending space) replaced below with
-      ;; version with an extra space for a passing test.
-      (dolist (v '("WikiWord# " "[[WikiWord]]" "<<WikiWord>>"
+      (dolist (v '("WikiWord#" "WikiWord# " "[[WikiWord]]" "<<WikiWord>>"
 		   "{[[WikiWord]]}" "([[WikiWord]])"))
 	(erase-buffer)
         (hywiki-tests--insert (setq str (format ";; %s" v)))