diff --git a/src/calibre/gui2/store/search.py b/src/calibre/gui2/store/search.py
index 0f4a82ee5b..d862e9e4c9 100644
--- a/src/calibre/gui2/store/search.py
+++ b/src/calibre/gui2/store/search.py
@@ -152,6 +152,7 @@ class SearchDialog(QDialog, Ui_Dialog):
             
     def closeEvent(self, e):
         self.model.closing()
+        self.search_pool.abort()
         QDialog.closeEvent(self, e)