diff --git a/docs/lib/sage_rails/app/sage_tokens/sage_tokens.rb b/docs/lib/sage_rails/app/sage_tokens/sage_tokens.rb
index 695461fad0..6c167117a4 100644
--- a/docs/lib/sage_rails/app/sage_tokens/sage_tokens.rb
+++ b/docs/lib/sage_rails/app/sage_tokens/sage_tokens.rb
@@ -270,6 +270,7 @@ def SageTokens.grid_templates
     "loop",
     "mail",
     "mail-filled",
+    "mail-open",
     "map",
     "mapped",
     "margin-left",