diff --git a/src/core/model/enum.h b/src/core/model/enum.h
index 454d5d0ef..464a7c039 100644
--- a/src/core/model/enum.h
+++ b/src/core/model/enum.h
@@ -73,7 +73,7 @@ class EnumValue : public AttributeValue
     bool DeserializeFromString(std::string value, Ptr<const AttributeChecker> checker) override;
 
   private:
-    T m_value; //!< The stored value.
+    T m_value{}; //!< The stored value.
 };
 
 template <typename T>