diff --git a/project.clj b/project.clj
index bca37e66..881f2e13 100644
--- a/project.clj
+++ b/project.clj
@@ -7,6 +7,7 @@
         :url "https://github.com/borkdude/babashka"}
   :license {:name "Eclipse Public License 1.0"
             :url "http://opensource.org/licenses/eclipse-1.0.php"}
+  :java-source-paths ["sci/src-java"]
   :source-paths ["src" "sci/src"]
   :resource-paths ["resources" "sci/resources"]
   :dependencies [[org.clojure/clojure "1.10.1"]