diff --git a/platform/pratt/api-dump-unreviewed.txt b/platform/pratt/api-dump-unreviewed.txt
index 6e9637b4abb7..7b206b6540de 100644
--- a/platform/pratt/api-dump-unreviewed.txt
+++ b/platform/pratt/api-dump-unreviewed.txt
@@ -4,8 +4,7 @@ a:com.intellij.platform.pratt.AppendTokenParser
 - <init>():V
 - pa:parseAppend(com.intellij.platform.pratt.PrattBuilder):com.intellij.psi.tree.IElementType
 - parseToken(com.intellij.platform.pratt.PrattBuilder):Z
-c:com.intellij.platform.pratt.MutableMarker
-- <init>(java.util.LinkedList,com.intellij.lang.PsiBuilder$Marker,I):V
+f:com.intellij.platform.pratt.MutableMarker
 - drop():V
 - error(java.lang.String):V
 - finish():V
diff --git a/platform/pratt/src/com/intellij/platform/pratt/MutableMarker.java b/platform/pratt/src/com/intellij/platform/pratt/MutableMarker.java
index 4b3a8ebb9231..7b072c243e6f 100644
--- a/platform/pratt/src/com/intellij/platform/pratt/MutableMarker.java
+++ b/platform/pratt/src/com/intellij/platform/pratt/MutableMarker.java
@@ -4,11 +4,12 @@ package com.intellij.platform.pratt;
 import com.intellij.lang.PsiBuilder;
 import com.intellij.openapi.util.NlsContexts;
 import com.intellij.psi.tree.IElementType;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.LinkedList;
 
-public class MutableMarker {
+public final class MutableMarker {
   enum Mode { READY, DROPPED, COMMITTED, ERROR }
 
   private final PsiBuilder.Marker myStartMarker;
@@ -17,7 +18,8 @@ public class MutableMarker {
   private final LinkedList<IElementType> myPath;
   private Mode myMode = Mode.READY;
 
-  public MutableMarker(final LinkedList<IElementType> path, final PsiBuilder.Marker startMarker, final int initialPathLength) {
+  @ApiStatus.Internal
+  MutableMarker(final LinkedList<IElementType> path, final PsiBuilder.Marker startMarker, final int initialPathLength) {
     myPath = path;
     myStartMarker = startMarker;
     myInitialPathLength = initialPathLength;