diff --git a/cockatrice/src/client/ui/window_main.cpp b/cockatrice/src/client/ui/window_main.cpp
index 7dabc96c6..721881c89 100644
--- a/cockatrice/src/client/ui/window_main.cpp
+++ b/cockatrice/src/client/ui/window_main.cpp
@@ -1099,7 +1099,7 @@ void MainWindow::cardDatabaseLoadingFailed()
 
 void MainWindow::cardDatabaseNewSetsFound(int numUnknownSets, QStringList unknownSetsNames)
 {
-    QMessageBox msgBox;
+    QMessageBox msgBox(this);
     msgBox.setWindowTitle(tr("New sets found"));
     msgBox.setIcon(QMessageBox::Question);
     msgBox.setText(tr("%n new set(s) found in the card database\n"