diff --git a/radicale/rights/regex.py b/radicale/rights/regex.py
index dfe9513a..afbba4fe 100644
--- a/radicale/rights/regex.py
+++ b/radicale/rights/regex.py
@@ -52,7 +52,7 @@ except ImportError:
 
 
 DEFINED_RIGHTS = {
-    "authenticated": "[rw]\nuser:.*\ncollection:.*\npermission:rw",
+    "authenticated": "[rw]\nuser:.+\ncollection:.*\npermission:rw",
     "owner_write": "[r]\nuser:.*\ncollection:.*\npermission:r\n"
                    "[w]\nuser:.*\ncollection:^%(login)s/.+$\npermission:w",
     "owner_only": "[rw]\nuser:.*\ncollection:^%(login)s/.+$\npermission:rw",