diff --git a/certbot-apache/certbot_apache/interfaces.py b/certbot-apache/certbot_apache/interfaces.py
index d815826b1..d04e13035 100644
--- a/certbot-apache/certbot_apache/interfaces.py
+++ b/certbot-apache/certbot_apache/interfaces.py
@@ -183,7 +183,7 @@ class DirectiveNode(ParserNode):
     name: str
 
     # Tuple of parameters of this ParserNode object, excluding whitespaces.
-    parameters: Tuple[str]
+    parameters: Tuple[str, ...]
 
     """