diff --git a/xs/maps/modperl_types.map b/xs/maps/modperl_types.map
index 3b02f0289..8c6d54170 100644
--- a/xs/maps/modperl_types.map
+++ b/xs/maps/modperl_types.map
@@ -7,6 +7,8 @@ struct modperl_filter_t | Apache2::OutputFilter
 SV *  | SV
 I32   | IV
 I32 * | IV
+U16   | UV
+U16 * | UV
 U32   | UV
 U32 * | UV