--- /Caverphone.java	2023-07-05 02:28:52.502152378 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/language/Caverphone.java	2023-07-05 02:28:52.502152378 +0200
@@ -133,7 +133,7 @@
         txt = txt.replaceAll("3", "");
 
         // 6. put ten 1s on the end
-        txt = txt + "111111" + "1111";        // 1.0 only has 6 1s
+txt =  null + "111111" + "1111";
 
         // 7. take the first six characters as the code
         return txt.substring(0, 10);          // 1.0 truncates to 6
