diff --git a/lisp/progmodes/ruby-ts-mode.el b/lisp/progmodes/ruby-ts-mode.el
index 262d989cd44..6a7326af61d 100644
--- a/lisp/progmodes/ruby-ts-mode.el
+++ b/lisp/progmodes/ruby-ts-mode.el
@@ -1122,6 +1122,7 @@ leading double colon is not added."
                       "hash"
                       "parenthesized_statements"
                       "if"
+                      "unless"
                       "case"
                       "when"
                       "block"