diff --git a/src/calibre/gui2/__init__.py b/src/calibre/gui2/__init__.py
index 6ea5627e55..d00c5e4e92 100644
--- a/src/calibre/gui2/__init__.py
+++ b/src/calibre/gui2/__init__.py
@@ -1106,6 +1106,7 @@ class Application(QApplication):
                 show_temp_dir_error(err)
             raise SystemExit('Failed to create temporary folder')
         if DEBUG and not headless:
+            prints('QPA platform:', self.platformName())
             prints('devicePixelRatio:', self.devicePixelRatio())
             s = self.primaryScreen()
             if s: