diff --git a/platform/core-impl/src/com/intellij/psi/impl/PsiDocumentManagerBase.java b/platform/core-impl/src/com/intellij/psi/impl/PsiDocumentManagerBase.java
index d68aaf56834b..a79b31ca635c 100644
--- a/platform/core-impl/src/com/intellij/psi/impl/PsiDocumentManagerBase.java
+++ b/platform/core-impl/src/com/intellij/psi/impl/PsiDocumentManagerBase.java
@@ -912,6 +912,7 @@ public abstract class PsiDocumentManagerBase extends PsiDocumentManager implemen
                                                    ModalityState.defaultModalityState());
   }
 
+  @ApiStatus.Internal
   public class PriorityEventCollector implements PrioritizedInternalDocumentListener {
     @Override
     public int getPriority() {