diff --git a/src/vtextdocumentlayout.cpp b/src/vtextdocumentlayout.cpp
index e17ef406..dd77c0c0 100644
--- a/src/vtextdocumentlayout.cpp
+++ b/src/vtextdocumentlayout.cpp
@@ -441,6 +441,7 @@ void VTextDocumentLayout::documentChanged(int p_from, int p_charsRemoved, int p_
     // May be an invalid block.
     QTextBlock changeEndBlock;
     if (p_charsRemoved == p_charsAdded
+        && newBlockCount == m_blockCount
         && changeStartBlock.position() == p_from
         && changeStartBlock.length() == p_charsAdded) {
         // TODO: we may need one more next block.
@@ -482,6 +483,8 @@ void VTextDocumentLayout::documentChanged(int p_from, int p_charsRemoved, int p_
         updateOffset(changeStartBlock);
     }
 
+    m_blockCount = newBlockCount;
+
     updateDocumentSize();
 
     // TODO: Update the view of all the blocks after changeStartBlock.