diff --git a/src/main/java/com/conveyal/r5/analyst/TravelTimeReducer.java b/src/main/java/com/conveyal/r5/analyst/TravelTimeReducer.java
index 1e6a19884..86e641e5d 100644
--- a/src/main/java/com/conveyal/r5/analyst/TravelTimeReducer.java
+++ b/src/main/java/com/conveyal/r5/analyst/TravelTimeReducer.java
@@ -186,8 +186,8 @@ private static int findPercentileIndex(int nElements, double percentile) {
         // Note that the commented-out definition is used in modern version of Conveyal Analysis, and the other version
         // was removed by #563. However, we used the previous version for the Getting Charlie off the MTA paper, and this
         // hacks it back in for comparability.
-        //return (int)(Math.ceil(percentile / 100 * nElements) - 1);
-        return (int) Math.round(percentile / 100 * nElements);
+        return (int)(Math.ceil(percentile / 100 * nElements) - 1);
+        // return (int) Math.round(percentile / 100 * nElements);
     }
 
     /**