diff --git a/debug/akonadisearchsyntaxhighlighter.h b/debug/akonadisearchsyntaxhighlighter.h
index aa28619..a279a1f 100644
--- a/debug/akonadisearchsyntaxhighlighter.h
+++ b/debug/akonadisearchsyntaxhighlighter.h
@@ -1,54 +1,54 @@
 /*
   Copyright (c) 2014-2019 Montel Laurent <montel@kde.org>
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
 
   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.
 
   You should have received a copy of the GNU General Public License along
   with this program; if not, write to the Free Software Foundation, Inc.,
   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
 #ifndef AKONADISEARCHSYNTAXHIGHLIGHTER_H
 #define AKONADISEARCHSYNTAXHIGHLIGHTER_H
 
 #include <QSyntaxHighlighter>
 
 namespace Akonadi
 {
 namespace Search
 {
 class Rule
 {
 public:
     Rule() {}
     Rule(const QRegExp &r, const QTextCharFormat &f)
         : pattern(r), format(f) {}
 
     QRegExp pattern;
     QTextCharFormat format;
 };
 
 class AkonadiSearchSyntaxHighlighter : public QSyntaxHighlighter
 {
     Q_OBJECT
 public:
     explicit AkonadiSearchSyntaxHighlighter(QTextDocument *doc);
-    ~AkonadiSearchSyntaxHighlighter();
+    ~AkonadiSearchSyntaxHighlighter() override;
 
     void highlightBlock(const QString &text) override;
 
 protected:
     void init();
     QVector<Rule> m_rules;
 };
 }
 }
 #endif // AKONADISEARCHSYNTAXHIGHLIGHTER_H