diff --git a/src/main/java/org/apache/commons/io/IOUtils.java b/src/main/java/org/apache/commons/io/IOUtils.java
index 7d7ee4c..63c7b30 100644
--- a/src/main/java/org/apache/commons/io/IOUtils.java
+++ b/src/main/java/org/apache/commons/io/IOUtils.java
@@ -1686,7 +1686,7 @@
     /**
      * Fills the given array with 0s.
      *
-     * @param arr The array to fill.
+     * @param arr The non-null array to fill.
      * @return The given array.
      */
     private static byte[] fill0(final byte[] arr) {
@@ -1697,7 +1697,7 @@
     /**
      * Fills the given array with 0s.
      *
-     * @param arr The array to fill.
+     * @param arr The non-null array to fill.
      * @return The given array.
      */
     private static char[] fill0(final char[] arr) {