diff --git a/lucene/core/src/java/org/apache/lucene/util/MathUtil.java b/lucene/core/src/java/org/apache/lucene/util/MathUtil.java
index 5382363e6f7..a25c637c9cf 100644
--- a/lucene/core/src/java/org/apache/lucene/util/MathUtil.java
+++ b/lucene/core/src/java/org/apache/lucene/util/MathUtil.java
@@ -17,6 +17,10 @@ package org.apache.lucene.util;
  * limitations under the License.
  */
 
+/**
+ * Math static utility methods.
+ */
+
 public final class MathUtil {
 
   // No instance: