diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 763a8eecfbd..0b568929b22 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2015-03-20  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* progmodes/ruby-mode.el (ruby-syntax-before-regexp-re): Expect
+	beginning of regexp also after open brace or vertical bar.
+	(Bug#20026)
+
 2015-03-07  Michael Albinus  <michael.albinus@gmx.de>
 
 	* net/tramp.el (tramp-ssh-controlmaster-options): Make it a
diff --git a/lisp/progmodes/ruby-mode.el b/lisp/progmodes/ruby-mode.el
index 3f560b9fee6..9c311cdbfb6 100644
--- a/lisp/progmodes/ruby-mode.el
+++ b/lisp/progmodes/ruby-mode.el
@@ -1777,7 +1777,7 @@ It will be properly highlighted even when the call omits parens.")
   (defvar ruby-syntax-before-regexp-re
     (concat
      ;; Special tokens that can't be followed by a division operator.
-     "\\(^\\|[[=(,~;<>]"
+     "\\(^\\|[[{|=(,~;<>]"
      ;; Distinguish ternary operator tokens.
      ;; FIXME: They don't really have to be separated with spaces.
      "\\|[?:] "