diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/MappingMongoConverter.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/MappingMongoConverter.java
index 31fa58e70..93217a8f3 100644
--- a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/MappingMongoConverter.java
+++ b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/MappingMongoConverter.java
@@ -2145,7 +2145,7 @@ public class MappingMongoConverter extends AbstractMongoConverter implements App
 	 *
 	 * @since 3.4.3
 	 */
-	interface ConversionContext {
+	protected interface ConversionContext {
 
 		/**
 		 * Converts a source object into {@link TypeInformation target}.