diff --git a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/messaging/MessagingSpanInjector.java b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/messaging/MessagingSpanInjector.java
index aacb4ef6c..de2afe29a 100644
--- a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/messaging/MessagingSpanInjector.java
+++ b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/messaging/MessagingSpanInjector.java
@@ -36,7 +36,7 @@ import org.springframework.util.StringUtils;
  *
  * @since 1.0.0
  */
-public class MessagingSpanInjector implements SpanInjector<MessageBuilder> {
+class MessagingSpanInjector implements SpanInjector<MessageBuilder> {
 
 	public static final String SPAN_HEADER = "X-Current-Span";