diff --git a/util.py b/util.py
index a086b94..1e6025c 100644
--- a/util.py
+++ b/util.py
@@ -13,7 +13,7 @@ def make_secret(password):
 
 
 SPECIAL_DN_CHARACTERS = "\\,+<>;\"= "
-SPECIAL_FILTER_CHARACTERS = "*()"
+SPECIAL_FILTER_CHARACTERS = "\\*()"
 
 
 def escape_special_characters(s, special_characters):