diff --git a/src/FSharp.Formatting.Common/HtmlModel.fs b/src/FSharp.Formatting.Common/HtmlModel.fs
index 3f25c765..17da8ae8 100644
--- a/src/FSharp.Formatting.Common/HtmlModel.fs
+++ b/src/FSharp.Formatting.Common/HtmlModel.fs
@@ -751,5 +751,6 @@ module internal Html =
     let iconifyIcon (props: HtmlProperties list) =
         HtmlElement.CustomElement("iconify-icon", props, [])
 
+    /// Toggle button for API doc details.
     let fsdocsDetailsToggle (props: HtmlProperties list) =
         HtmlElement.CustomElement("fsdocs-details-toggle", props, [])