diff --git a/p/db/station-board-req.js b/p/db/station-board-req.js
index 1b64d616..e1a80203 100644
--- a/p/db/station-board-req.js
+++ b/p/db/station-board-req.js
@@ -11,7 +11,7 @@ const formatStationBoardReq = (ctx, station, type) => {
 			zeit: profile.formatTimeOfDay(profile, opt.when),
 			datum: profile.formatDate(profile, opt.when),
 			mitVias: maxVias !== 0 ? true : undefined,
-			maxVias,
+			maxVias: maxVias === -1 ? undefined : maxVias,
 			verkehrsmittel: profile.formatProductsFilter(ctx, opt.products || {}),
 		},
 		method: 'GET',
diff --git a/test/format/db-arrivals-query.js b/test/format/db-arrivals-query.js
index 7799b49f..9b26d3a9 100644
--- a/test/format/db-arrivals-query.js
+++ b/test/format/db-arrivals-query.js
@@ -62,6 +62,11 @@ tap.test('formats an arrivals() request with different vias option', (t) => {
 	t.equal(reqViasNull.query.mitVias, undefined);
 	t.equal(reqViasNull.query.maxVias, 0);
 
+	ctx.opt.vias = -1;
+	const reqViasUnlimited = profile.formatStationBoardReq(ctx, '8011160', 'arrivals');
+	t.equal(reqViasUnlimited.query.mitVias, true);
+	t.equal(reqViasUnlimited.query.maxVias, undefined);
+
 	ctx.opt.vias = 42;
 	const reqViasFourtyTwo = profile.formatStationBoardReq(ctx, '8011160', 'arrivals');
 	t.equal(reqViasFourtyTwo.query.mitVias, true);