diff --git a/hibernate-core/src/main/java/org/hibernate/annotations/CurrentTimestampGeneration.java b/hibernate-core/src/main/java/org/hibernate/annotations/CurrentTimestampGeneration.java
index fcda7d8c3f..6c1c191087 100644
--- a/hibernate-core/src/main/java/org/hibernate/annotations/CurrentTimestampGeneration.java
+++ b/hibernate-core/src/main/java/org/hibernate/annotations/CurrentTimestampGeneration.java
@@ -6,6 +6,7 @@
  */
 package org.hibernate.annotations;
 
+import org.hibernate.Internal;
 import org.hibernate.dialect.Dialect;
 import org.hibernate.tuple.AnnotationValueGeneration;
 import org.hibernate.tuple.GenerationTiming;
@@ -20,6 +21,7 @@ import org.hibernate.tuple.ValueGenerator;
  *
  * @author Steve Ebersole
  */
+@Internal
 public class CurrentTimestampGeneration implements AnnotationValueGeneration<CurrentTimestamp> {
 	private GenerationTiming timing;
 	private ValueGenerator<?> generator;
diff --git a/hibernate-core/src/main/java/org/hibernate/annotations/SourceGeneration.java b/hibernate-core/src/main/java/org/hibernate/annotations/SourceGeneration.java
index 1e62653ffb..861ee133c0 100644
--- a/hibernate-core/src/main/java/org/hibernate/annotations/SourceGeneration.java
+++ b/hibernate-core/src/main/java/org/hibernate/annotations/SourceGeneration.java
@@ -7,6 +7,7 @@
 package org.hibernate.annotations;
 
 import org.hibernate.AssertionFailure;
+import org.hibernate.Internal;
 import org.hibernate.Session;
 import org.hibernate.dialect.Dialect;
 import org.hibernate.engine.jdbc.spi.JdbcCoordinator;
@@ -40,6 +41,7 @@ import static org.hibernate.tuple.GenerationTiming.ALWAYS;
  * @deprecated because {@link Source} is generated, though this implementation is instructive
  */
 @Deprecated(since = "6.2")
+@Internal
 public class SourceGeneration implements AnnotationValueGeneration<Source>, ValueGenerator<Object> {
 
 	private static final CoreMessageLogger log = Logger.getMessageLogger(