diff --git a/src/java/org/apache/poi/ss/formula/FormulaShifter.java b/src/java/org/apache/poi/ss/formula/FormulaShifter.java
index e26cc2c85..a74cc51e4 100644
--- a/src/java/org/apache/poi/ss/formula/FormulaShifter.java
+++ b/src/java/org/apache/poi/ss/formula/FormulaShifter.java
@@ -457,7 +457,7 @@ public final class FormulaShifter {
      * Returns <code>null</code> or {@link #RefErrorPtg} if no change was made
      *
      * @param aptg
-     * @return
+     * @return The Ptg reference if the cell would move due to copy, otherwise null
      */
     private Ptg rowCopyRefPtg(RefPtgBase rptg) {
         final int refRow = rptg.getRow();
diff --git a/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFSheet.java b/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFSheet.java
index 56cd1e749..610ec2ecd 100644
--- a/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFSheet.java
+++ b/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFSheet.java
@@ -1291,7 +1291,7 @@ public class XSSFSheet extends POIXMLDocumentPart implements Sheet {
      * @param startRow the first row number in this sheet to return
      * @param endRow the last row number in this sheet to return
      * @param createRowIfMissing
-     * @return
+     * @return All rows between startRow and endRow, inclusive
      * @throws IllegalArgumentException if startRowNum and endRowNum are not in ascending order
      */
     private List<XSSFRow> getRows(int startRowNum, int endRowNum, boolean createRowIfMissing) {