diff --git a/js/enemy.mjs b/js/enemy.mjs
index 61a8ce6..5dced80 100644
--- a/js/enemy.mjs
+++ b/js/enemy.mjs
@@ -47,7 +47,7 @@ export function create (...args) {
 	return enemy;
 }
 
-export function set_behaviour (enemy, behaviour, params) {
+function set_behaviour (enemy, behaviour, params) {
 	behaviours.init(enemy, behaviour, params);
 }