diff --git a/poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFCellStyle.java b/poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFCellStyle.java
index 3f78756a7d..d6408bc0a4 100644
--- a/poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFCellStyle.java
+++ b/poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFCellStyle.java
@@ -70,7 +70,7 @@ public final class HSSFCellStyle implements CellStyle, Duplicatable {
 
 
     /**
-     * get the index within the HSSFWorkbook (sequence within the collection of ExtnededFormat objects)
+     * get the index within the HSSFWorkbook (sequence within the collection of ExtendedFormat objects)
      * @return unique index number of the underlying record this style represents (probably you don't care
      *  unless you're comparing which one is which)
      */
diff --git a/poi/src/main/java/org/apache/poi/ss/usermodel/CellStyle.java b/poi/src/main/java/org/apache/poi/ss/usermodel/CellStyle.java
index 8417887f5f..983ba99b9c 100644
--- a/poi/src/main/java/org/apache/poi/ss/usermodel/CellStyle.java
+++ b/poi/src/main/java/org/apache/poi/ss/usermodel/CellStyle.java
@@ -22,7 +22,7 @@ import org.apache.poi.util.Removal;
 public interface CellStyle {
 
     /**
-     * get the index within the Workbook (sequence within the collection of ExtnededFormat objects)
+     * get the index within the Workbook (sequence within the collection of ExtendedFormat objects)
      * @return unique index number of the underlying record this style represents (probably you don't care
      *  unless you're comparing which one is which)
      */