diff --git a/source/documentation/syntax/special-functions.html.md.erb b/source/documentation/syntax/special-functions.html.md.erb
index 27d9ba0..b23a469 100644
--- a/source/documentation/syntax/special-functions.html.md.erb
+++ b/source/documentation/syntax/special-functions.html.md.erb
@@ -84,13 +84,22 @@ calls][]—it's parsed as a normal [plain CSS function call][].
       font-weight: 400
 <% end %>
 
-## `calc()`, `element()`, `progid:...()`, and `expression()`
+## `calc()`, `clamp()`, `element()`, `progid:...()`, and `expression()`
 
-The [`calc()`][] and [`element()`][] functions are defined in the CSS spec.
-Because `calc()`'s mathematical expressions conflict with Sass's arithmetic, and
-`element()`'s IDs could be parsed as colors, they need special parsing.
+<% impl_status dart: "1.31.0", libsass: false, ruby: false, feature: "clamp()" do %>
+  LibSass, Ruby Sass, and older versions of Dart Sass treat `clamp()` as a
+  [plain CSS function] rather than supporting special syntax within it.
+
+  [plain CSS function]: ../at-rules/function#plain-css-functions
+<% end %>
+
+The [`calc()`], [`clamp()`] and [`element()`] functions are defined in the CSS
+spec. Because `calc()`'s mathematical expressions conflict with Sass's
+arithmetic, and `element()`'s IDs could be parsed as colors, they need special
+parsing.
 
 [`calc()`]: https://developer.mozilla.org/en-US/docs/Web/CSS/calc
+[`clamp()`]: https://developer.mozilla.org/en-US/docs/Web/CSS/clamp
 [`element()`]: https://developer.mozilla.org/en-US/docs/Web/CSS/element
 
 [`expression()`][] and functions beginning with [`progid:`][] are legacy