diff --git a/src/easy/easy.hpp b/src/easy/easy.hpp
index 58cc899..f314f80 100644
--- a/src/easy/easy.hpp
+++ b/src/easy/easy.hpp
@@ -356,6 +356,11 @@ public:
          */
         virtual ~Entity();
 
+        /*!
+         *  Returns the JSON object of the Entity
+         *
+         *  @since  0.100.0
+         */
         operator const Json::Value() const;
 
         /*!
diff --git a/src/easy/entity.cpp b/src/easy/entity.cpp
index df51565..ae2ca4a 100644
--- a/src/easy/entity.cpp
+++ b/src/easy/entity.cpp
@@ -39,7 +39,8 @@ Easy::Entity::Entity(const Json::Value &object)
 {}
 
 Easy::Entity::Entity()
-: _was_set(false)
+: _tree(Json::nullValue)
+, _was_set(false)
 {}
 
 Easy::Entity::~Entity()
diff --git a/src/easy/simple_calls.cpp b/src/easy/simple_calls.cpp
index 4ac660b..dfce346 100644
--- a/src/easy/simple_calls.cpp
+++ b/src/easy/simple_calls.cpp
@@ -155,7 +155,7 @@ const return_entity_vector Easy::get_notifications(const uint16_t limit,
 
         // Transform vector of strings to vector of Notification.
         std::transform(answer_v.begin(), answer_v.end(), notifications.begin(),
-                       [](const string s)
+                       [](const string &s)
                        { return GenericEntity(s); });
 
         return { ret.error_code, ret.error_message, notifications };