diff --git a/src/backend/pwroutefiltermodel.rs b/src/backend/pwroutefiltermodel.rs
index ce565f0..9891f83 100644
--- a/src/backend/pwroutefiltermodel.rs
+++ b/src/backend/pwroutefiltermodel.rs
@@ -68,7 +68,7 @@ mod imp {
                         .skip(position as usize)
                         .map_while(Result::ok)
                         .enumerate() {
-                        if routeobject.direction() == widget.direction() && routeobject.availability() == ParamAvailability::Yes {
+                        if routeobject.direction() == widget.direction() && routeobject.availability() == ParamAvailability::Yes || routeobject.availability() == ParamAvailability::Unknown {
                             hashset.insert(a as u32);
                         }
                     }