1 files changed, 1 insertions, 0 deletions
diff --git a/ruby.c b/ruby.c
index c9cd10d687..536772032b 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1216,6 +1216,7 @@ rb_f_chomp(argc, argv)
 }
 
 void rb_stdio_set_default_encoding(void);
+VALUE rb_parser_dump_tree(NODE *node, int comment);
 
 static VALUE
 process_options(int argc, char **argv, struct cmdline_options *opt)