diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml
index d646f0cefe..a73e4498fe 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -1062,8 +1062,8 @@ account_threepid_delegates:
 # Useful when provisioning users based on the contents of a 3rd party
 # directory and to avoid ambiguities.
 #
-#disable_set_displayname: False
-#disable_set_avatar_url: False
+#disable_set_displayname: false
+#disable_set_avatar_url: false
 
 # Users who register on this homeserver will automatically be joined
 # to these rooms
diff --git a/synapse/config/registration.py b/synapse/config/registration.py
index bdbd6f3130..0422c39451 100644
--- a/synapse/config/registration.py
+++ b/synapse/config/registration.py
@@ -338,8 +338,8 @@ class RegistrationConfig(Config):
         # Useful when provisioning users based on the contents of a 3rd party
         # directory and to avoid ambiguities.
         #
-        #disable_set_displayname: False
-        #disable_set_avatar_url: False
+        #disable_set_displayname: false
+        #disable_set_avatar_url: false
 
         # Users who register on this homeserver will automatically be joined
         # to these rooms