diff --git a/tools/lammps-gui/codeeditor.cpp b/tools/lammps-gui/codeeditor.cpp
index 71d9cfd370..ba50a1db1d 100644
--- a/tools/lammps-gui/codeeditor.cpp
+++ b/tools/lammps-gui/codeeditor.cpp
@@ -151,25 +151,6 @@ void CodeEditor::resizeEvent(QResizeEvent *e)
     lineNumberArea->setGeometry(QRect(cr.left(), cr.top(), lineNumberAreaWidth(), cr.height()));
 }
 
-void CodeEditor::highlightCurrentLine()
-{
-    QList<QTextEdit::ExtraSelection> extraSelections;
-
-    if (!isReadOnly()) {
-        QTextEdit::ExtraSelection selection;
-
-        QColor lineColor = QColor(Qt::yellow).lighter(160);
-
-        selection.format.setBackground(lineColor);
-        selection.format.setProperty(QTextFormat::FullWidthSelection, true);
-        selection.cursor = textCursor();
-        selection.cursor.clearSelection();
-        extraSelections.append(selection);
-    }
-
-    setExtraSelections(extraSelections);
-}
-
 void CodeEditor::lineNumberAreaPaintEvent(QPaintEvent *event)
 {
     QPainter painter(lineNumberArea);
diff --git a/tools/lammps-gui/codeeditor.h b/tools/lammps-gui/codeeditor.h
index 2ecf8b8f24..0f2dc51c65 100644
--- a/tools/lammps-gui/codeeditor.h
+++ b/tools/lammps-gui/codeeditor.h
@@ -40,7 +40,6 @@ protected:
 
 private slots:
     void updateLineNumberAreaWidth(int newBlockCount);
-    void highlightCurrentLine();
     void updateLineNumberArea(const QRect &rect, int dy);
     void get_help();
     void find_help(QString &page, QString &help);