diff --git a/src/calibre/gui2/ui.py b/src/calibre/gui2/ui.py
index 163194a64a..c4d20d25d7 100644
--- a/src/calibre/gui2/ui.py
+++ b/src/calibre/gui2/ui.py
@@ -907,7 +907,7 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin,  # {{{
             font.setBold(True)
             font.setItalic(True)
         self.virtual_library.setFont(font)
-        title = '{0} - || {1}{2} ||'.format(
+        title = '{0} — || {1}{2} ||'.format(
                 __appname__, self.iactions['Choose Library'].library_name(), restrictions)
         self.setWindowTitle(title)