diff --git a/misc/ruby-mode.el b/misc/ruby-mode.el
index 553591f3c9..026f541364 100644
--- a/misc/ruby-mode.el
+++ b/misc/ruby-mode.el
@@ -1304,7 +1304,7 @@ balanced expression is found."
           ;; ?' ?" ?` are ascii codes
           ("\\(^\\|[^\\\\]\\)\\(\\\\\\\\\\)*[?$]\\([#\"'`]\\)" 3 (1 . nil))
           ;; regexps
-          ("\\(^\\|[[=(,~?:;<>]\\|\\(^\\|\\s \\)\\(if\\|elsif\\|unless\\|while\\|until\\|when\\|and\\|or\\|&&\\|||\\)\\|g?sub!?\\|scan\\|split!?\\)\\s *\\(/\\)[^/\n\\\\]*\\(\\\\.[^/\n\\\\]*\\)*\\(/\\)"
+          ("\\(^\\|[[{|=(,~?:;<>]\\|\\(^\\|\\s \\)\\(if\\|elsif\\|unless\\|while\\|until\\|when\\|and\\|or\\|&&\\|||\\)\\|g?sub!?\\|scan\\|split!?\\)\\s *\\(/\\)[^/\n\\\\]*\\(\\\\.[^/\n\\\\]*\\)*\\(/\\)"
            (4 (7 . ?/))
            (6 (7 . ?/)))
           ("^\\(=\\)begin\\(\\s \\|$\\)" 1 (7 . nil))