diff --git a/parser-tools/private-yacc/input-file-parser.rkt b/parser-tools/private-yacc/input-file-parser.rkt
index 447c665..7ddd62c 100644
--- a/parser-tools/private-yacc/input-file-parser.rkt
+++ b/parser-tools/private-yacc/input-file-parser.rkt
@@ -3,6 +3,7 @@
          yaragg/parser-tools/private-lex/token-syntax
          yaragg/parser-tools/private-yacc/grammar
          racket/contract
+         (except-in racket/list remove-duplicates)
          (for-template racket/base))
 
 ;; routines for parsing the input to the parser generator and producing a