diff --git a/lucene/CHANGES.txt b/lucene/CHANGES.txt
index 635f2fcbb151..e87e01eb6cff 100644
--- a/lucene/CHANGES.txt
+++ b/lucene/CHANGES.txt
@@ -336,6 +336,8 @@ Other
 * GITHUB#15867: Use IllegalCallerException to signal wrong caller in internal classes
   (VectorizationProvider, TestSecrets).  (Uwe Schindler)
 
+* GITHUB#15892: Change access modifier for readAdvise in MMapDirectory (Navneet Verma)
+
 ======================= Lucene 10.4.0 =======================
 
 API Changes
diff --git a/lucene/core/src/java/org/apache/lucene/store/MMapDirectory.java b/lucene/core/src/java/org/apache/lucene/store/MMapDirectory.java
index 8ca59a07ddf2..a8dd58731ee3 100644
--- a/lucene/core/src/java/org/apache/lucene/store/MMapDirectory.java
+++ b/lucene/core/src/java/org/apache/lucene/store/MMapDirectory.java
@@ -169,7 +169,7 @@ public class MMapDirectory extends FSDirectory {
         return Optional.of(Constants.DEFAULT_READADVICE);
       };
 
-  private BiFunction<String, IOContext, Optional<ReadAdvice>> readAdvice =
+  protected BiFunction<String, IOContext, Optional<ReadAdvice>> readAdvice =
       (_, _) -> Optional.empty();
 
   private BiPredicate<String, IOContext> preload = NO_FILES;