diff --git a/lisp/progmodes/ruby-mode.el b/lisp/progmodes/ruby-mode.el
index e441ffbbfe3..9d8f45604f9 100644
--- a/lisp/progmodes/ruby-mode.el
+++ b/lisp/progmodes/ruby-mode.el
@@ -2708,7 +2708,7 @@ Currently there are `ruby-mode' and `ruby-ts-mode'."
                    'ruby-mode))
 
 ;;;###autoload
-(dolist (name (list "ruby" "rbx" "jruby" "ruby1.9" "ruby1.8"))
+(dolist (name (list "ruby" "rbx" "jruby" "j?ruby\\(?:[0-9.]+\\)"))
   (add-to-list 'interpreter-mode-alist (cons (purecopy name) 'ruby-mode)))
 
 (provide 'ruby-mode)