diff --git a/DEVELOPER.md b/DEVELOPER.md
index e754621..c7e5eee 100644
--- a/DEVELOPER.md
+++ b/DEVELOPER.md
@@ -8,6 +8,7 @@ lein cleantest
 
 ```
 rm -rf out/
+lein javac
 lein cljx
 rlwrap java -cp `lein classpath` clojure.main repl.clj
 (require 'com.rpl.specter.cljs-test-runner)