diff --git a/build.gradle b/build.gradle
index 73a9d578bd3..6f7999493a9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -736,6 +736,9 @@ def createJavadocTask(taskName, taskDescription, memberLevel) {
         }
 
         classpath = configurations.allProjects
+        if (isJava8) {
+            classpath += configurations.javacJar
+        }
 
         destinationDir.deleteDir()
         options.memberLevel = memberLevel