diff --git a/aqt/browser.py b/aqt/browser.py
index 04dffa4ef..f9959dce3 100644
--- a/aqt/browser.py
+++ b/aqt/browser.py
@@ -1375,7 +1375,7 @@ where id in %s""" % ids2str(sf))
         elapMS = int((time.time() - self._lastPreviewRender)*1000)
         if elapMS < 500:
             self._previewTimer = self.mw.progress.timer(
-                500-elapMS, lambda: self._renderScheduledPreview(), False)
+                500-elapMS, self._renderScheduledPreview, False)
         else:
             self._renderScheduledPreview()