diff --git a/surefire-api/src/main/java/org/apache/maven/surefire/api/booter/Constants.java b/surefire-api/src/main/java/org/apache/maven/surefire/api/booter/Constants.java
index d1be7ac..bcb7b17 100644
--- a/surefire-api/src/main/java/org/apache/maven/surefire/api/booter/Constants.java
+++ b/surefire-api/src/main/java/org/apache/maven/surefire/api/booter/Constants.java
@@ -32,4 +32,5 @@
     public static final String MAGIC_NUMBER = "maven-surefire-event";
     public static final byte[] MAGIC_NUMBER_BYTES = MAGIC_NUMBER.getBytes( US_ASCII );
     public static final Charset DEFAULT_STREAM_ENCODING = UTF_8;
+    public static final byte[] DEFAULT_STREAM_ENCODING_BYTES = UTF_8.name().getBytes( US_ASCII );
 }
diff --git a/surefire-booter/src/main/java/org/apache/maven/surefire/booter/spi/LegacyMasterProcessChannelEncoder.java b/surefire-booter/src/main/java/org/apache/maven/surefire/booter/spi/LegacyMasterProcessChannelEncoder.java
index dba0f9b..0d8f787 100644
--- a/surefire-booter/src/main/java/org/apache/maven/surefire/booter/spi/LegacyMasterProcessChannelEncoder.java
+++ b/surefire-booter/src/main/java/org/apache/maven/surefire/booter/spi/LegacyMasterProcessChannelEncoder.java
@@ -43,6 +43,7 @@
 import static java.nio.CharBuffer.wrap;
 import static java.util.Objects.requireNonNull;
 import static org.apache.maven.surefire.api.booter.Constants.DEFAULT_STREAM_ENCODING;
+import static org.apache.maven.surefire.api.booter.Constants.DEFAULT_STREAM_ENCODING_BYTES;
 import static org.apache.maven.surefire.api.booter.Constants.MAGIC_NUMBER_BYTES;
 import static org.apache.maven.surefire.api.booter.ForkedProcessEventType.BOOTERCODE_BYE;
 import static org.apache.maven.surefire.api.booter.ForkedProcessEventType.BOOTERCODE_CONSOLE_DEBUG;
@@ -476,7 +477,7 @@
         String charsetName = encoder.charset().name();
         result.put( (byte) charsetName.length() );
         result.put( (byte) ':' );
-        encoder.encode( wrap( charsetName ), result, true );
+        result.put( DEFAULT_STREAM_ENCODING_BYTES );
         result.put( (byte) ':' );
     }