diff --git a/ElementX/Sources/Screens/Authentication/OIDCAuthenticationPresenter.swift b/ElementX/Sources/Screens/Authentication/OIDCAuthenticationPresenter.swift
index efbc57582..2906916f8 100644
--- a/ElementX/Sources/Screens/Authentication/OIDCAuthenticationPresenter.swift
+++ b/ElementX/Sources/Screens/Authentication/OIDCAuthenticationPresenter.swift
@@ -37,6 +37,9 @@ class OIDCAuthenticationPresenter: NSObject {
             
             session.prefersEphemeralWebBrowserSession = false
             session.presentationContextProvider = self
+            session.additionalHeaderFields = [
+                "X-Element-User-Agent": UserAgentBuilder.makeASCIIUserAgent()
+            ]
             
             activeSession = session
             session.start()
diff --git a/ElementX/Sources/Screens/Settings/AccountSettings/OIDCAccountSettingsPresenter.swift b/ElementX/Sources/Screens/Settings/AccountSettings/OIDCAccountSettingsPresenter.swift
index 81d27576b..b0af707ba 100644
--- a/ElementX/Sources/Screens/Settings/AccountSettings/OIDCAccountSettingsPresenter.swift
+++ b/ElementX/Sources/Screens/Settings/AccountSettings/OIDCAccountSettingsPresenter.swift
@@ -31,6 +31,9 @@ class OIDCAccountSettingsPresenter: NSObject {
         let session = ASWebAuthenticationSession(url: accountURL, callback: .oidcRedirectURL(oidcRedirectURL)) { _, _ in }
         session.prefersEphemeralWebBrowserSession = false
         session.presentationContextProvider = self
+        session.additionalHeaderFields = [
+            "X-Element-User-Agent": UserAgentBuilder.makeASCIIUserAgent()
+        ]
         session.start()
     }
 }