diff --git a/oni-groovy.el b/oni-groovy.el
index b8f5211..57844a8 100644
--- a/oni-groovy.el
+++ b/oni-groovy.el
@@ -4,7 +4,7 @@
 
 ;; Author: Tom Willemse <tom@ryuslash.org>
 ;; Keywords: local
-;; Version: 2022.0926.132722
+;; Version: 2023.0505.164419
 ;; Package-Requires: (groovy-mode oni-embrace oni-smartparens groovy-imports rainbow-delimiters jenkinsfile-mode)
 
 ;; This program is free software; you can redistribute it and/or modify
@@ -88,5 +88,13 @@
 (with-eval-after-load 'grep
   (add-to-list 'grep-files-aliases '("groovy" . "*.groovy *.pipeline Jenkinsfile")))
 
+(setf (alist-get "Functions" groovy-imenu-regexp nil nil #'string=)
+      (list (rx line-start "def"
+                (minimal-match (one-or-more whitespace))
+                (group alpha (minimal-match (zero-or-more alphanumeric)))
+                (minimal-match (zero-or-more whitespace))
+                "(")
+            1))
+
 (provide 'oni-groovy)
 ;;; oni-groovy.el ends here