diff --git a/modules/grouping/src/java/org/apache/lucene/search/grouping/package.html b/modules/grouping/src/java/org/apache/lucene/search/grouping/package.html
index 173b736ff38..9365232c8d6 100644
--- a/modules/grouping/src/java/org/apache/lucene/search/grouping/package.html
+++ b/modules/grouping/src/java/org/apache/lucene/search/grouping/package.html
@@ -174,7 +174,7 @@ fields, <code>FieldCache</code>, etc.).
   s.search(new TermQuery(new Term("content", searchTerm)), c);
   // Return all group heads as int array
   int[] groupHeadsArray = c.retrieveGroupHeads()
-  // Return all group heads as OpenBitSet.
+  // Return all group heads as FixedBitSet.
   int maxDoc = s.maxDoc();
   FixedBitSet groupHeadsBitSet = c.retrieveGroupHeads(maxDoc)
 </pre>