diff --git a/mdoc/src/main/scala/mdoc/internal/markdown/MarkdownBuilder.scala b/mdoc/src/main/scala/mdoc/internal/markdown/MarkdownBuilder.scala
index 00041499..767036a6 100644
--- a/mdoc/src/main/scala/mdoc/internal/markdown/MarkdownBuilder.scala
+++ b/mdoc/src/main/scala/mdoc/internal/markdown/MarkdownBuilder.scala
@@ -85,6 +85,7 @@ object MarkdownBuilder {
         val runtime = defaultClasspath(path => {
           val pathString = path.toString
           pathString.contains("scala-library") ||
+          pathString.contains("scala3-library") ||
           pathString.contains("scala-reflect") ||
           pathString.contains("fansi") ||
           pathString.contains("pprint") ||