diff --git a/java/fake_ncipher/build.gradle.kts b/java/fake_ncipher/build.gradle.kts
index b026e3ad..e70eca5b 100644
--- a/java/fake_ncipher/build.gradle.kts
+++ b/java/fake_ncipher/build.gradle.kts
@@ -18,3 +18,7 @@ publishing {
         }
     }
 }
+
+java {
+    withSourcesJar()
+}