diff --git a/platform/core-impl/src/com/intellij/psi/impl/BlockSupportImpl.java b/platform/core-impl/src/com/intellij/psi/impl/BlockSupportImpl.java
index e3c035a93e96..bcbf988be32d 100644
--- a/platform/core-impl/src/com/intellij/psi/impl/BlockSupportImpl.java
+++ b/platform/core-impl/src/com/intellij/psi/impl/BlockSupportImpl.java
@@ -1,4 +1,4 @@
-// Copyright 2000-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// Copyright 2000-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 
 package com.intellij.psi.impl;
 
@@ -128,7 +128,8 @@ public class BlockSupportImpl extends BlockSupport {
         final TextRange textRange = astNode.getTextRange();
 
         if (textRange.getLength() + lengthShift > 0 &&
-            (baseLanguage.isKindOf(elementType.getLanguage()) || !TreeUtil.containsOuterLanguageElements(astNode))) {
+            (baseLanguage.isKindOf(elementType.getLanguage()) || elementType instanceof IReparseableLeafElementType ||
+             !TreeUtil.containsOuterLanguageElements(astNode))) {
           final int start = textRange.getStartOffset();
           final int end = start + textRange.getLength() + lengthShift;
           if (end > newFileText.length()) {