1 files changed, 1 insertions, 0 deletions
diff --git a/eval.h b/eval.h
index 16388691..d10e7f8b 100644
--- a/eval.h
+++ b/eval.h
@@ -27,6 +27,7 @@
 
 extern val dwim_s, lambda_s, progn_s, vector_lit_s, vec_list_s, list_s;
 extern val hash_lit_s, hash_construct_s, struct_lit_s, qref_s, uref_s;
+extern val tree_lit_s, tree_construct_s;
 extern val eval_error_s, if_s, call_s, identity_s;
 extern val eq_s, eql_s, equal_s, less_s;
 extern val car_s, cdr_s;