diff --git a/sdk/src/main/java/ch/opentransportdata/ojp/data/dto/response/tir/leg/DatedJourneyDto.kt b/sdk/src/main/java/ch/opentransportdata/ojp/data/dto/response/tir/leg/DatedJourneyDto.kt
index 7c45f84..1d0e584 100644
--- a/sdk/src/main/java/ch/opentransportdata/ojp/data/dto/response/tir/leg/DatedJourneyDto.kt
+++ b/sdk/src/main/java/ch/opentransportdata/ojp/data/dto/response/tir/leg/DatedJourneyDto.kt
@@ -123,7 +123,7 @@ fun DatedJourneyDto.minimalCopy(): DatedJourneyDto {
         trainNumber = trainNumber,
         operatorRef = null,
         publicCode = null,
-        directionRef = null,
+        directionRef = directionRef,
         originStopPointRef = null,
         destinationStopPointRef = null,
         destinationText = null,