diff --git a/src/UserData/UserDataCollectionValue.hpp b/src/UserData/UserDataCollectionValue.hpp
index 8728036..32eda09 100644
--- a/src/UserData/UserDataCollectionValue.hpp
+++ b/src/UserData/UserDataCollectionValue.hpp
@@ -67,6 +67,7 @@ namespace Porygon::UserData {
 
         void SetIndexValue(const EvalValue *key, const EvalValue* value) const final{
             _helper->Set(key, value);
+            delete value;
         }
     };
 }