diff --git a/src/gui/MainWindow.cpp b/src/gui/MainWindow.cpp
index 806109d8..d7127e9e 100644
--- a/src/gui/MainWindow.cpp
+++ b/src/gui/MainWindow.cpp
@@ -397,7 +397,7 @@ void MainWindow::databaseTabChanged(int tabIndex)
 
 void MainWindow::closeEvent(QCloseEvent* event)
 {
-    openDatabases.clear();
+    m_openDatabases.clear();
     bool openPreviousDatabasesOnStartup = config()->get("OpenPreviousDatabasesOnStartup").toBool();
 
     if (openPreviousDatabasesOnStartup) {
@@ -413,7 +413,7 @@ void MainWindow::closeEvent(QCloseEvent* event)
 
     if (openPreviousDatabasesOnStartup) {
         disconnect(m_ui->tabWidget, SIGNAL(databaseWithFileClosed(QString)), this, SLOT(rememberOpenDatabases(QString)));
-        config()->set("LastOpenedDatabases", openDatabases);
+        config()->set("LastOpenedDatabases", m_openDatabases);
     }
 }
 
@@ -442,7 +442,7 @@ void MainWindow::setShortcut(QAction* action, QKeySequence::StandardKey standard
     }
 }
 
-void MainWindow::rememberOpenDatabases(QString filePath)
+void MainWindow::rememberOpenDatabases(const QString& filePath)
 {
-    openDatabases.append(filePath);
+    m_openDatabases.append(filePath);
 }
diff --git a/src/gui/MainWindow.h b/src/gui/MainWindow.h
index 74a3a83c..8e96ec9b 100644
--- a/src/gui/MainWindow.h
+++ b/src/gui/MainWindow.h
@@ -57,7 +57,7 @@ private Q_SLOTS:
     void showEntryContextMenu(const QPoint& globalPos);
     void showGroupContextMenu(const QPoint& globalPos);
     void saveToolbarState(bool value);
-    void rememberOpenDatabases(QString filePath);
+    void rememberOpenDatabases(const QString& filePath);
 
 private:
     static void setShortcut(QAction* action, QKeySequence::StandardKey standard, int fallback = 0);
@@ -69,7 +69,7 @@ private:
     QAction* m_clearHistoryAction;
     QActionGroup* m_lastDatabasesActions;
     QActionGroup* m_copyAdditionalAttributeActions;
-    QStringList openDatabases;
+    QStringList m_openDatabases;
 
     Q_DISABLE_COPY(MainWindow)
 };