diff --git a/ext/ripper/tools/dsl.rb b/ext/ripper/tools/dsl.rb
index d2b9715a71..49ff51711f 100644
--- a/ext/ripper/tools/dsl.rb
+++ b/ext/ripper/tools/dsl.rb
@@ -7,6 +7,9 @@
 #   v2 = dispatch0(void_stmt);
 #   $$ = dispatch2(stmts_add, v1, v2);
 
+$dollar = "$$"
+alias $$ $dollar
+
 class DSL
   def initialize(code, options)
     @events = {}