diff --git a/core/src/main/scala/com/lightbend/paradox/markdown/Directive.scala b/core/src/main/scala/com/lightbend/paradox/markdown/Directive.scala
index 8b543b28..d6a1b4d4 100644
--- a/core/src/main/scala/com/lightbend/paradox/markdown/Directive.scala
+++ b/core/src/main/scala/com/lightbend/paradox/markdown/Directive.scala
@@ -324,6 +324,7 @@ case class ScaladocDirective(ctx: Writer.Context)
 
 object JavadocDirective {
 
+  type LinkStyle = String
   val LinkStyleFrames = "frames"
   val LinkStyleDirect = "direct"
 
@@ -333,6 +334,16 @@ object JavadocDirective {
   val jdkDependentLinkStyle = if (sys.props.get("java.specification.version").exists(_.startsWith("1."))) LinkStyleFrames else LinkStyleDirect
 
   final val JavadocLinkStyleProperty = raw"""javadoc\.(.*).link_style""".r
+
+  private[markdown] def url(link: String, baseUrl: Url, linkStyle: LinkStyle): Url = {
+    val url = Url(link).base
+    val path = url.getPath.replaceAll("(\\b[a-z]+)\\.", "$1/") + ".html"
+    linkStyle match {
+      case LinkStyleFrames => baseUrl.withEndingSlash.withQuery(path).withFragment(url.getFragment)
+      case LinkStyleDirect => (baseUrl / path).withFragment(url.getFragment)
+    }
+  }
+
 }
 
 case class JavadocDirective(ctx: Writer.Context)
@@ -353,12 +364,8 @@ case class JavadocDirective(ctx: Writer.Context)
     val packagesDeepestFirst = packages.reverse
     val baseUrl = packagesDeepestFirst.collectFirst(baseUrls).getOrElse(defaultBaseUrl).resolve()
     val linkStyle = packagesDeepestFirst.collectFirst(packageLinkStyle).getOrElse(rootLinkStyle)
-    val url = Url(link).base
-    val path = url.getPath.replace('.', '/') + ".html"
-    linkStyle match {
-      case LinkStyleFrames => baseUrl.withEndingSlash.withQuery(path).withFragment(url.getFragment)
-      case LinkStyleDirect => (baseUrl / path).withFragment(url.getFragment)
-    }
+    url(link, baseUrl, linkStyle)
+
   }
 }
 
diff --git a/tests/src/test/scala/com/lightbend/paradox/markdown/JavadocDirectiveSpec.scala b/tests/src/test/scala/com/lightbend/paradox/markdown/JavadocDirectiveSpec.scala
index 8efab9f9..7e03fc4d 100644
--- a/tests/src/test/scala/com/lightbend/paradox/markdown/JavadocDirectiveSpec.scala
+++ b/tests/src/test/scala/com/lightbend/paradox/markdown/JavadocDirectiveSpec.scala
@@ -20,6 +20,8 @@ import com.lightbend.paradox.ParadoxException
 
 class JavadocDirectiveSpec extends MarkdownBaseSpec {
 
+  import JavadocDirective._
+
   implicit val context = writerContextWithProperties(
     "javadoc.base_url" -> "http://www.reactive-streams.org/reactive-streams-1.0.0-javadoc/",
     "javadoc.link_style" -> "frames",
@@ -115,4 +117,20 @@ class JavadocDirectiveSpec extends MarkdownBaseSpec {
           |Direct: <a href="http://www.reactive-streams.org/reactive-streams-1.0.0-javadoc/org/reactivestreams/Publisher.html" title="org.reactivestreams.Publisher"><code>Publisher</code></a></p>""".stripMargin)
   }
 
+  it should "correctly link to an inner JRE class" in {
+    url(
+      "java.util.concurrent.Flow.Subscriber",
+      Url("https://docs.oracle.com/en/java/javase/11/docs/api/java.base/"),
+      LinkStyleDirect
+    ) should be(Url("https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/Flow.Subscriber.html"))
+  }
+
+  it should "correctly link to an inner Akka class" in {
+    url(
+      "akka.actor.testkit.typed.Effect.MessageAdapter",
+      Url("https://doc.akka.io/japi/akka/current/"),
+      LinkStyleDirect
+    ) should be(Url("https://doc.akka.io/japi/akka/current/akka/actor/testkit/typed/Effect.MessageAdapter.html"))
+  }
+
 }