diff --git a/src/mcm.c b/src/mcm.c
index b36076d..8eef267 100644
--- a/src/mcm.c
+++ b/src/mcm.c
@@ -152,8 +152,8 @@ static int mk_mcm(){
         trajectory_point->speed.speedValue = EI2_SpeedValue_unavailable;
         trajectory_point->speed.speedConfidence = EI2_SpeedConfidence_unavailable;
         EI2_IntermediatePointReference_t* ipr = &trajectory_point->intermediatePoint.choice.reference;
-        ipr->deltaReferencePosition.deltaLatitude = traj_points[i].deltaLongitude._0;
-        ipr->deltaReferencePosition.deltaLongitude = traj_points[i].deltaLatitude._0;
+        ipr->deltaReferencePosition.deltaLatitude = traj_points[i].deltaLatitude._0;
+        ipr->deltaReferencePosition.deltaLongitude = traj_points[i].deltaLongitude._0;
         ipr->deltaReferencePosition.deltaAltitude = traj_points[i].deltaAltitude._0;
         ipr->referenceHeading.headingValue = EI2_HeadingValue_unavailable;
         ipr->referenceHeading.headingConfidence = EI2_HeadingConfidence_unavailable;