diff --git a/src/unlocker/spoofing.cpp b/src/unlocker/spoofing.cpp
index c0ff009..7691389 100644
--- a/src/unlocker/spoofing.cpp
+++ b/src/unlocker/spoofing.cpp
@@ -217,6 +217,7 @@ void Spoofer::modifyCharacterData(json& js)
     stackableIds.insert(_camperOfferingIds.begin(), _camperOfferingIds.end());
     stackableIds.insert(_camperAddonIds.begin(), _camperAddonIds.end());
     stackableIds.insert(_slasherAddonIds.begin(), _slasherAddonIds.end());
+    stackableIds.insert(_slasherOfferingIds.begin(), _slasherOfferingIds.end());
 
     if (js.contains("characterItems") && js["characterItems"].is_array())
     {