diff --git a/h3/src/config.rs b/h3/src/config.rs
index c2a6fe64..1f828ae2 100644
--- a/h3/src/config.rs
+++ b/h3/src/config.rs
@@ -50,12 +50,21 @@ impl From<&frame::Settings> for Settings {
             max_field_section_size: settings
                 .get(frame::SettingId::MAX_HEADER_LIST_SIZE)
                 .unwrap_or(defaults.max_field_section_size),
+            // A peer signals WebTransport support with either the legacy
+            // draft-02 boolean or the RFC-track WT_MAX_SESSIONS (> 0 means
+            // supported); WebKit sends only the latter.
             enable_webtransport: settings
                 .get(frame::SettingId::ENABLE_WEBTRANSPORT)
                 .map(|value| value != 0)
+                .or_else(|| {
+                    settings
+                        .get(frame::SettingId::WT_MAX_SESSIONS)
+                        .map(|value| value != 0)
+                })
                 .unwrap_or(defaults.enable_webtransport),
             max_webtransport_sessions: settings
-                .get(frame::SettingId::WEBTRANSPORT_MAX_SESSIONS)
+                .get(frame::SettingId::WT_MAX_SESSIONS)
+                .or_else(|| settings.get(frame::SettingId::WEBTRANSPORT_MAX_SESSIONS))
                 .unwrap_or(defaults.max_webtransport_sessions),
             enable_datagram: settings
                 .get(frame::SettingId::H3_DATAGRAM)
@@ -129,6 +138,9 @@ impl TryFrom<Config> for frame::Settings {
             frame::SettingId::WEBTRANSPORT_MAX_SESSIONS,
             max_webtransport_sessions,
         )?;
+        // Advertise the RFC-track codepoint alongside the legacy pair:
+        // Chrome accepts either dialect, WebKit requires this one.
+        settings.insert(frame::SettingId::WT_MAX_SESSIONS, max_webtransport_sessions)?;
 
         Ok(settings)
     }
diff --git a/h3/src/proto/frame.rs b/h3/src/proto/frame.rs
index a09520bb..9c70a1dc 100644
--- a/h3/src/proto/frame.rs
+++ b/h3/src/proto/frame.rs
@@ -406,6 +406,7 @@ impl SettingId {
                 | SettingId::ENABLE_CONNECT_PROTOCOL
                 | SettingId::ENABLE_WEBTRANSPORT
                 | SettingId::WEBTRANSPORT_MAX_SESSIONS
+                | SettingId::WT_MAX_SESSIONS
                 | SettingId::H3_DATAGRAM,
         )
     }
@@ -455,6 +456,9 @@ setting_identifiers! {
     H3_SETTING_ENABLE_DATAGRAM_CHROME_SPECIFIC= 0xFFD277,
 
     WEBTRANSPORT_MAX_SESSIONS = 0x2b603743,
+    // RFC-track codepoint (draft-ietf-webtrans-http3 draft-07+); WebKit
+    // requires this one and ignores the legacy pair above.
+    WT_MAX_SESSIONS = 0xc671706a,
 }
 
 const SETTINGS_LEN: usize = 8;