diff --git a/mockito-kotlin/build.gradle b/mockito-kotlin/build.gradle
index f9eb3c9..2bda2c5 100644
--- a/mockito-kotlin/build.gradle
+++ b/mockito-kotlin/build.gradle
@@ -31,7 +31,7 @@ dependencies {
 }
 
 dokkaHtml.configure {
-    outputDirectory.set(file("${layout.buildDirectory}/javadoc"))
+    outputDirectory.set(layout.buildDirectory.dir("javadoc"))
 
     dokkaSourceSets {
         named("main") {