diff --git a/addons/javelin/XEH_pre_init.sqf b/addons/javelin/XEH_pre_init.sqf
index 1accd4a8f4..29aae9dd35 100644
--- a/addons/javelin/XEH_pre_init.sqf
+++ b/addons/javelin/XEH_pre_init.sqf
@@ -9,5 +9,6 @@ PREP(showFireMode);
 PREP(onFired);
 PREP(onOpticLoad);
 PREP(onOpticDraw);
+PREP(onOpticUnload);
 
 GVAR(isLockKeyDown) = false;
\ No newline at end of file