1 files changed, 1 insertions, 0 deletions
diff --git a/ccross.mlb b/ccross.mlb
index db831ea..38c8146 100644
--- a/ccross.mlb
+++ b/ccross.mlb
@@ -8,6 +8,7 @@ in
 
     stream.sig stream.sml
     hashtable.sig hashtable.sml
+    tree.sig tree.sml
     tokenizer.sig tokenizer.fun
     ppc.sig ppc.fun
     exn_handler.sig exn_handler.fun