diff --git a/homeassistant/config_entries.py b/homeassistant/config_entries.py
index 347ca294d34..139e2066d17 100644
--- a/homeassistant/config_entries.py
+++ b/homeassistant/config_entries.py
@@ -39,6 +39,9 @@ SOURCE_IGNORE = "ignore"
 # been removed and unloaded.
 SOURCE_UNIGNORE = "unignore"
 
+# This is used to signal that re-authentication is required by the user.
+SOURCE_REAUTH = "reauth"
+
 HANDLERS = Registry()
 
 STORAGE_KEY = "core.config_entries"