diff --git a/crates/caldav/src/calendar/resource.rs b/crates/caldav/src/calendar/resource.rs
index 2c891eb..03bbe04 100644
--- a/crates/caldav/src/calendar/resource.rs
+++ b/crates/caldav/src/calendar/resource.rs
@@ -317,16 +317,11 @@ impl Resource for CalendarResource {
     }
 
     fn get_user_privileges(&self, user: &Principal) -> Result<UserPrivilegeSet, Self::Error> {
-        if self.cal.subscription_url.is_some() {
+        if self.cal.subscription_url.is_some() || self.read_only {
             return Ok(UserPrivilegeSet::owner_write_properties(
                 user.is_principal(&self.cal.principal),
             ));
         }
-        if self.read_only {
-            return Ok(UserPrivilegeSet::owner_read(
-                user.is_principal(&self.cal.principal),
-            ));
-        }
 
         Ok(UserPrivilegeSet::owner_only(
             user.is_principal(&self.cal.principal),
diff --git a/crates/store/src/calendar_store.rs b/crates/store/src/calendar_store.rs
index 94dd83a..99b9c4e 100644
--- a/crates/store/src/calendar_store.rs
+++ b/crates/store/src/calendar_store.rs
@@ -98,5 +98,6 @@ pub trait CalendarStore: Send + Sync + 'static {
         object_id: &str,
     ) -> Result<(), Error>;
 
+    // read_only refers to objects, metadata may still be updated
     fn is_read_only(&self, cal_id: &str) -> bool;
 }