diff --git a/src/plugins/texteditor/basetextdocumentlayout.cpp b/src/plugins/texteditor/basetextdocumentlayout.cpp
index 087eb09ccff..18a41919f88 100644
--- a/src/plugins/texteditor/basetextdocumentlayout.cpp
+++ b/src/plugins/texteditor/basetextdocumentlayout.cpp
@@ -400,6 +400,7 @@ BaseTextDocumentLayout::BaseTextDocumentLayout(QTextDocument *doc)
     :QPlainTextDocumentLayout(doc) {
     lastSaveRevision = 0;
     hasMarks = 0;
+    m_requiredWidth = 0;
 }
 
 BaseTextDocumentLayout::~BaseTextDocumentLayout()