diff --git a/org.eclipse.jdt.apt.core/src/org/eclipse/jdt/apt/core/internal/AptCompilationParticipant.java b/org.eclipse.jdt.apt.core/src/org/eclipse/jdt/apt/core/internal/AptCompilationParticipant.java
index df91e0549d9..302f0e0524e 100644
--- a/org.eclipse.jdt.apt.core/src/org/eclipse/jdt/apt/core/internal/AptCompilationParticipant.java
+++ b/org.eclipse.jdt.apt.core/src/org/eclipse/jdt/apt/core/internal/AptCompilationParticipant.java
@@ -218,7 +218,7 @@ public String[] getAnnotationProcessorPaths(IJavaProject project, boolean isTest
 		List<String> processorPaths = new ArrayList<>();
 		FactoryPath factoryPath = FactoryPathUtil.getFactoryPath(project);
 		if (factoryPath == null) {
-			return super.getAnnotationProcessorPaths(project, isTest);
+			return null;
 		}
 
 		factoryPath.getEnabledContainers().keySet().forEach(container -> {
@@ -233,7 +233,7 @@ public String[] getAnnotationProcessorPaths(IJavaProject project, boolean isTest
 			return processorPaths.toArray(new String[processorPaths.size()]);
 		}
 
-		return super.getAnnotationProcessorPaths(project, isTest);
+		return null;
 	}
 
 	@Override
diff --git a/org.eclipse.jdt.core/model/org/eclipse/jdt/core/compiler/CompilationParticipant.java b/org.eclipse.jdt.core/model/org/eclipse/jdt/core/compiler/CompilationParticipant.java
index 0b877a96c50..029a9d0e711 100644
--- a/org.eclipse.jdt.core/model/org/eclipse/jdt/core/compiler/CompilationParticipant.java
+++ b/org.eclipse.jdt.core/model/org/eclipse/jdt/core/compiler/CompilationParticipant.java
@@ -153,31 +153,29 @@ public void processAnnotations(BuildContext[] files) {
 }
 
 /**
- * Provisional API for experimental support for an alternative compiler
- * and can be removed without notice.
- *
- * Returns where to find annotation processors. If this is not specified,
- * then the class path is searched for processors.
+ * Requests the participant to supply the locations where to find annotation
+ * processors. If this is not specified, then the class path is searched for
+ * processors.
  *
  * @param project the project to participate in
  * @param isTest whether the annotation processor path is for test code
  * @return the annotation processor paths
  * @since 3.38
+ * @noreference Provisional API for experimental support for an alternative compiler. This method is not intended to be referenced by clients.
  */
 public String[] getAnnotationProcessorPaths(IJavaProject project, boolean isTest) {
 	return null;
 }
 
 /**
- * Provisional API for experimental support for an alternative compiler,
- * and can be removed without notice.
- *
- * Returns the locations to place the generated source files.
+ * Requests the participant to supply the locations to place the generated
+ * source files.
  *
  * @param project the project to participate in
  * @param isTest whether the generated source paths are for test code
  * @return the locations to place the generated source files
  * @since 3.38
+ * @noreference Provisional API for experimental support for an alternative compiler. This method is not intended to be referenced by clients.
  */
 public String[] getGeneratedSourcePaths(IJavaProject project, boolean isTest) {
 	return null;