diff --git a/lucene/core/src/java/org/apache/lucene/codecs/perfield/PerFieldDocValuesFormat.java b/lucene/core/src/java/org/apache/lucene/codecs/perfield/PerFieldDocValuesFormat.java
index a2e0ad6b5d9..4461ae54d40 100644
--- a/lucene/core/src/java/org/apache/lucene/codecs/perfield/PerFieldDocValuesFormat.java
+++ b/lucene/core/src/java/org/apache/lucene/codecs/perfield/PerFieldDocValuesFormat.java
@@ -214,7 +214,7 @@ public abstract class PerFieldDocValuesFormat extends DocValuesFormat {
 
     public FieldsReader(final SegmentReadState readState) throws IOException {
 
-      // Read _X.per and init each format:
+      // Init each unique format:
       boolean success = false;
       try {
         // Read field name -> format name