diff --git a/crates/tranquil-config/src/lib.rs b/crates/tranquil-config/src/lib.rs
index 4cbffae..95db9b0 100644
--- a/crates/tranquil-config/src/lib.rs
+++ b/crates/tranquil-config/src/lib.rs
@@ -406,11 +406,6 @@ pub struct ServerConfig {
     #[config(env = "PDS_USER_HANDLE_DOMAINS", parse_env = split_comma_list)]
     pub user_handle_domains: Option<Vec<String>>,
 
-    /// List of domains available for user registration.
-    /// Defaults to the PDS hostname when not set.
-    #[config(env = "AVAILABLE_USER_DOMAINS", parse_env = split_comma_list)]
-    pub available_user_domains: Option<Vec<String>>,
-
     /// Enable PDS-hosted did:web identities.  Hosting did:web requires a
     /// long-term commitment to serve DID documents; opt-in only.
     #[config(env = "ENABLE_PDS_HOSTED_DID_WEB", default = false)]
@@ -470,13 +465,6 @@ impl ServerConfig {
         self.banned_words.clone().unwrap_or_default()
     }
 
-    /// Returns the available user domains, falling back to `[hostname_without_port]`.
-    pub fn available_user_domain_list(&self) -> Vec<String> {
-        self.available_user_domains
-            .clone()
-            .unwrap_or_else(|| vec![self.hostname_without_port().to_string()])
-    }
-
     /// Returns the user handle domains, falling back to `[hostname_without_port]`.
     pub fn user_handle_domain_list(&self) -> Vec<String> {
         self.user_handle_domains
diff --git a/crates/tranquil-pds/src/api/server/meta.rs b/crates/tranquil-pds/src/api/server/meta.rs
index 5f093c7..3a9531c 100644
--- a/crates/tranquil-pds/src/api/server/meta.rs
+++ b/crates/tranquil-pds/src/api/server/meta.rs
@@ -34,7 +34,7 @@ pub fn is_self_hosted_did_web_enabled() -> bool {
 pub async fn describe_server() -> impl IntoResponse {
     let cfg = tranquil_config::get();
     let pds_hostname = &cfg.server.hostname;
-    let domains = cfg.server.available_user_domain_list();
+    let domains = cfg.server.user_handle_domain_list();
     let invite_code_required = cfg.server.invite_code_required;
     let privacy_policy = cfg.server.privacy_policy_url.clone();
     let terms_of_service = cfg.server.terms_of_service_url.clone();