diff --git a/msvc/ecl.def b/msvc/ecl.def
index 2e6443ee5..fd524fe7e 100644
--- a/msvc/ecl.def
+++ b/msvc/ecl.def
@@ -1299,6 +1299,10 @@ EXPORTS
 	cl_notevery
 	cl_map_into
 	si_closest_vector_type
+	si_make_seq_iterator
+	si_seq_iterator_ref
+	si_seq_iterator_set
+	si_seq_iterator_next
 
 	; seqlib.lsp