diff --git a/contribs/drt/src/main/java/org/matsim/contrib/drt/prebooking/PrebookingStopActivity.java b/contribs/drt/src/main/java/org/matsim/contrib/drt/prebooking/PrebookingStopActivity.java
index dc8a1ae9346..1e1965d11a6 100644
--- a/contribs/drt/src/main/java/org/matsim/contrib/drt/prebooking/PrebookingStopActivity.java
+++ b/contribs/drt/src/main/java/org/matsim/contrib/drt/prebooking/PrebookingStopActivity.java
@@ -129,10 +129,10 @@ private boolean updatePickupRequests(double now) {
 		}
 
 		var enterIterator = enterTimes.entrySet().iterator();
-		int availableCapacity = vehicle.getCapacity() - onboard;
 
 		while (enterIterator.hasNext()) {
 			var entry = enterIterator.next();
+			int availableCapacity = vehicle.getCapacity() - onboard;
 
 			if (entry.getValue() <= now) {
 				int requiredCapacity = pickupRequests.get(entry.getKey()).getPassengerCount();