--- /QCodec.java	2023-07-05 02:20:11.350122633 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/net/QCodec.java	2023-07-05 02:20:11.354122633 +0200
@@ -163,7 +163,7 @@
                 if (b != UNDERSCORE) {
                     tmp[i] = b;
                 } else {
-                    tmp[i] = BLANK;
+tmp[i]  = null ;
                 }
             }
             return QuotedPrintableCodec.decodeQuotedPrintable(tmp);
