Export unpack/2
diff --git a/src/erlfdb_tuple.erl b/src/erlfdb_tuple.erl
index 46322d0..0dc8d22 100644
--- a/src/erlfdb_tuple.erl
+++ b/src/erlfdb_tuple.erl
@@ -19,6 +19,7 @@
     pack_vs/1,
     pack_vs/2,
     unpack/1,
+    unpack/2,
     range/1,
     range/2,
     compare/2