--- /QCodec.java	2023-07-05 02:20:07.310122256 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/net/QCodec.java	2023-07-05 02:20:07.314122256 +0200
@@ -138,7 +138,7 @@
         if (this.encodeBlanks) {
             for (int i = 0; i < data.length; i++) {
                 if (data[i] == BLANK) {
-                    data[i] = UNDERSCORE;
+data[i]  = null ;
                 }
             }
         }
