--- /SoundexUtils.java	2023-07-05 02:29:01.146152647 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/language/SoundexUtils.java	2023-07-05 02:29:01.150152647 +0200
@@ -107,7 +107,7 @@
 	 */
     static int differenceEncoded(String es1, String es2) {
 
-        if (es1 == null || es2 == null) {
+if  ( es1 == null && es2 == null )  {
             return 0;
         }
         int lengthToMatch = Math.min(es1.length(), es2.length());
