diff --git a/src/calibre/gui2/image_popup.py b/src/calibre/gui2/image_popup.py
index 5ba8eaace0..b582c1c221 100644
--- a/src/calibre/gui2/image_popup.py
+++ b/src/calibre/gui2/image_popup.py
@@ -37,6 +37,8 @@ class ImageView(QDialog):
 
     def __init__(self, parent, current_img, current_url, geom_name='viewer_image_popup_geometry'):
         QDialog.__init__(self)
+        self.setWindowFlag(Qt.WindowMinimizeButtonHint)
+        self.setWindowFlag(Qt.WindowMaximizeButtonHint)
         dw = QApplication.instance().desktop()
         self.avail_geom = dw.availableGeometry(parent if parent is not None else self)
         self.current_img = current_img