diff --git a/lucene/classification/src/java/org/apache/lucene/classification/SimpleNaiveBayesClassifier.java b/lucene/classification/src/java/org/apache/lucene/classification/SimpleNaiveBayesClassifier.java
index 5a99cef09d2..c5a68f288d1 100644
--- a/lucene/classification/src/java/org/apache/lucene/classification/SimpleNaiveBayesClassifier.java
+++ b/lucene/classification/src/java/org/apache/lucene/classification/SimpleNaiveBayesClassifier.java
@@ -221,7 +221,7 @@ public class SimpleNaiveBayesClassifier implements Classifier<BytesRef> {
    * tokenize a <code>String</code> on this classifier's text fields and analyzer
    *
    * @param doc the <code>String</code> representing an input text (to be classified)
-   * @return
+   * @return a <code>String</code> array of the resulting tokens
    * @throws IOException
    */
   protected String[] tokenizeDoc(String doc) throws IOException {