diff --git a/build.gradle b/build.gradle
index 7c2f8d87e53..dd79739ce27 100644
--- a/build.gradle
+++ b/build.gradle
@@ -69,7 +69,7 @@ subprojects {
     task sourcesJar(type: Jar) {
         metaInf.with(licenseSpec)
         from {
-            sourceSets.main.allJava
+            sourceSets.main.allSource
         }
         archiveClassifier = "sources"
     }