diff --git a/jvector-base/src/main/java/io/github/jbellis/jvector/pq/KMeansPlusPlusClusterer.java b/jvector-base/src/main/java/io/github/jbellis/jvector/pq/KMeansPlusPlusClusterer.java
index 1ac1a3e8c..e911f2cd4 100644
--- a/jvector-base/src/main/java/io/github/jbellis/jvector/pq/KMeansPlusPlusClusterer.java
+++ b/jvector-base/src/main/java/io/github/jbellis/jvector/pq/KMeansPlusPlusClusterer.java
@@ -54,9 +54,9 @@ public KMeansPlusPlusClusterer(float[][] points, int k, BiFunction<float[], floa
         this.points = points;
         this.k = k;
         this.distanceFunction = distanceFunction;
-        this.random = new Random();
-        this.centroidDenoms = new int[k];
-        this.centroidNums = new float[k][points[0].length];
+        random = new Random();
+        centroidDenoms = new int[k];
+        centroidNums = new float[k][points[0].length];
         centroids = chooseInitialCentroids(points);
         assignments = new int[points.length];
         assignPointsToClusters();