diff --git a/letsencrypt/interfaces.py b/letsencrypt/interfaces.py
index be82787b5..a2e8506e6 100644
--- a/letsencrypt/interfaces.py
+++ b/letsencrypt/interfaces.py
@@ -201,7 +201,9 @@ class IConfig(zope.interface.Interface):
         "Email used for registration and recovery contact.")
     rsa_key_size = zope.interface.Attribute("Size of the RSA key.")
     must_staple = zope.interface.Attribute(
-        "Whether to request the OCSP Must Staple extension.")
+        "Whether to request the OCSP Must Staple certificate extension. "
+        "Additional setup may be required after issuance. This does not "
+        "currently autoconfigure web servers for OCSP stapling. ")
 
     config_dir = zope.interface.Attribute("Configuration directory.")
     work_dir = zope.interface.Attribute("Working directory.")