1 files changed, 1 insertions, 2 deletions
diff --git a/src/designer/src/designer/qdesigner_formwindow.cpp b/src/designer/src/designer/qdesigner_formwindow.cpp
index 7ef8b1f98..3c6dc2f12 100644
--- a/src/designer/src/designer/qdesigner_formwindow.cpp
+++ b/src/designer/src/designer/qdesigner_formwindow.cpp
@@ -174,8 +174,7 @@ void QDesignerFormWindow::updateWindowTitle(const QString &fileName)
     if (fileName.isEmpty()) {
         fileNameTitle += "untitled"_L1;
         if (const int maxUntitled = getNumberOfUntitledWindows()) {
-            fileNameTitle += QLatin1Char(' ');
-            fileNameTitle += QString::number(maxUntitled + 1);
+            fileNameTitle += u' ' + QString::number(maxUntitled + 1);
         }
     } else {
         fileNameTitle = QFileInfo(fileName).fileName();