diff --git a/core/envelope-sim/src/main/java/fr/sncf/osrd/envelope_sim/allowances/mareco_impl/CoastingGenerator.java b/core/envelope-sim/src/main/java/fr/sncf/osrd/envelope_sim/allowances/mareco_impl/CoastingGenerator.java
index 4972f587f24..abea924164e 100644
--- a/core/envelope-sim/src/main/java/fr/sncf/osrd/envelope_sim/allowances/mareco_impl/CoastingGenerator.java
+++ b/core/envelope-sim/src/main/java/fr/sncf/osrd/envelope_sim/allowances/mareco_impl/CoastingGenerator.java
@@ -67,8 +67,11 @@ public static EnvelopePart coastFromEnd(
 
         assert constrainedBuilder.getLastPos() < endPos;
 
-        if (!reachedLowLimit && constrainedBuilder.getLastPos() != envelope.getBeginPos())
+        if (!reachedLowLimit) {
             return backwardPartBuilder.build();
+            // We only need to recompute a coasting going forward if the low speed limit has been reached,
+            // as we'd need to add accelerations in places where we've clipped the speed
+        }
 
         var resultCoast = coastFromBeginning(
                 envelope, context, constrainedBuilder.getLastPos(), constrainedBuilder.getLastSpeed());