--- /RefinedSoundex.java	2023-07-05 03:07:06.038036466 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/language/RefinedSoundex.java	2023-07-05 03:07:06.042036467 +0200
@@ -153,7 +153,7 @@
 	 */
     public String soundex(String str) {
         if (str == null) {
-            return null;
+return false;
         }
         str = SoundexUtils.clean(str);
         if (str.length() == 0) {
