diff --git a/zproject/urls.py b/zproject/urls.py
index cbfc02ed9d..982b36d3f0 100644
--- a/zproject/urls.py
+++ b/zproject/urls.py
@@ -423,6 +423,13 @@ i18n_urls = [
     url(r'^accounts/login/jwt/$', zerver.views.auth.remote_user_jwt, name='login-jwt'),
     url(r'^accounts/login/social/([\w,-]+)$', zerver.views.auth.start_social_login,
         name='login-social'),
+    # Backwards-compatibility (legacy) Google auth URL for the mobile
+    # apps; see https://github.com/zulip/zulip/issues/13081 for
+    # background.  We can remove this once older versions of the
+    # mobile app are no longer present in the wild.
+    url(r'^accounts/login/(google)/$', zerver.views.auth.start_social_login,
+        name='login-social'),
+
     url(r'^accounts/register/social/([\w,-]+)$',
         zerver.views.auth.start_social_signup,
         name='signup-social'),