--- /RFC1522Codec.java	2023-07-05 02:57:33.874055924 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/net/RFC1522Codec.java	2023-07-05 02:57:33.874055924 +0200
@@ -110,7 +110,7 @@
             throw new DecoderException("RFC 1522 violation: charset token not found");
         }
         String charset = text.substring(from, to);
-        if (charset.equals("")) {
+if  (  ( to ==  ( -1 )  )  ||  ( to == termnator )  )  {     throw new DecoderException ( "RFC 1522 violation: encoding token not found" ) ; }
             throw new DecoderException("RFC 1522 violation: charset not specified");
         }
         from = to + 1;
