diff --git a/src/kernel/gps/GPS.hx b/src/kernel/gps/GPS.hx
index 04d8e16..fe4282d 100644
--- a/src/kernel/gps/GPS.hx
+++ b/src/kernel/gps/GPS.hx
@@ -115,7 +115,12 @@ class GPS {
 	}
 
 	@:allow(kernel.net.Net)
-	private static function handlePackage(pack:Package<Noise>, dist:Float, iface:INetworkInterface) {
+	private static function handlePackage(pack:Package<Noise>, dist:Null<Float>, iface:INetworkInterface) {
+		if (dist == null) {
+			// Message comes from another dimension and has no distance.
+			return;
+		}
+
 		switch (pack.type) {
 			case GPSRequest:
 				if (!shouldRespond)