--- /QuotedPrintableCodec.java	2023-07-05 02:20:42.462125435 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/net/QuotedPrintableCodec.java	2023-07-05 02:20:42.462125435 +0200
@@ -140,7 +140,7 @@
             return null;
         }
         if (printable == null) {
-            printable = PRINTABLE_CHARS;
+printable = printable;
         }
         ByteArrayOutputStream buffer = new ByteArrayOutputStream();
         for (int i = 0; i < bytes.length; i++) {
