1 files changed, 1 insertions, 0 deletions
diff --git a/src/type/subst.rs b/src/type/subst.rs
index 3ee4260..ab9d38a 100644
--- a/src/type/subst.rs
+++ b/src/type/subst.rs
@@ -44,6 +44,7 @@ impl Type {
             QuoteTy => QuoteTy,
             VecType => VecType,
             LetType => LetType,
+	    NilType => NilType,
 
         }
     }