diff --git a/src/astro/BuiltByMark.astro b/src/astro/BuiltByMark.astro
index d919b32..2ab4240 100644
--- a/src/astro/BuiltByMark.astro
+++ b/src/astro/BuiltByMark.astro
@@ -1,5 +1,5 @@
 ---
-import { renderBrandMark } from '@kolektiv/brand-core';
+import { renderBrandVariant } from '@kolektiv/brand-core';
 import type { DocsChromeConfig } from '@kolektiv/common-docs-chrome';
 
 interface Props {
@@ -13,8 +13,9 @@ const builtBy = config?.builtBy ?? {};
 const href = builtBy.href ?? 'https://kolektiv.computer';
 const label = builtBy.label ?? 'Built by Kolektiv Computing';
 const external = /^[a-z][a-z0-9+.-]*:/i.test(href);
-const mark = renderBrandMark({
-  variant: 'builtByMark',
+// The legacy `renderBrandMark` variant map left the icon mark (the initial K)
+// out of `builtByMark`, so render the generated per-variant content instead.
+const mark = renderBrandVariant('builtByMark', {
   title: label,
   color: 'currentColor',
   className: markClass,