diff --git a/httpclient5/src/main/java/org/apache/hc/client5/http/utils/ByteArrayBuilder.java b/httpclient5/src/main/java/org/apache/hc/client5/http/utils/ByteArrayBuilder.java
index f68797ac5..d8a8b6400 100644
--- a/httpclient5/src/main/java/org/apache/hc/client5/http/utils/ByteArrayBuilder.java
+++ b/httpclient5/src/main/java/org/apache/hc/client5/http/utils/ByteArrayBuilder.java
@@ -201,7 +201,7 @@ public final class ByteArrayBuilder {
 
     @Override
     public String toString() {
-        return this.buffer != null ? this.buffer.toString() : "null";
+        return String.valueOf(this.buffer);
     }
 
 }