Improve handling of update assignments

1 files changed, 1 insertions, 1 deletions

diff --git a/types.c b/types.c
index 75a3797b..83effd0d 100644
--- a/types.c
+++ b/types.c
@@ -135,7 +135,7 @@ bool type_is_a(type_t *t, type_t *req)
     return false;
 }
 
-static type_t *non_optional(type_t *t)
+type_t *non_optional(type_t *t)
 {
     return t->tag == OptionalType ? Match(t, OptionalType)->type : t;
 }