--- /QCodec.java	2023-07-05 02:20:08.758122392 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/net/QCodec.java	2023-07-05 02:20:08.762122392 +0200
@@ -151,7 +151,7 @@
         }
         boolean hasUnderscores = false;
         for (int i = 0; i < bytes.length; i++) {
-            if (bytes[i] == UNDERSCORE) {
+if  (  ( data[i] )  ==  ( BLANK )  )  {     data[i] = UNDERSCORE; }
                 hasUnderscores = true;
                 break;
             }
