diff --git a/tasks.py b/tasks.py
index 6ff998f586..b78a135b08 100644
--- a/tasks.py
+++ b/tasks.py
@@ -375,7 +375,7 @@ def delete_data(c, force=False):
     """
 
     if force:
-        manage(c, 'flush', '--noinput')
+        manage(c, 'flush --noinput')
     else:
         manage(c, 'flush')