diff --git a/source/RobotAPI/libraries/skills/core/Skill.h b/source/RobotAPI/libraries/skills/core/Skill.h
index bc7402a979742ec20a94ab2b63044ee9a94c80aa..b147e455f07039d430ab3113e8fec18298c09458 100644
--- a/source/RobotAPI/libraries/skills/core/Skill.h
+++ b/source/RobotAPI/libraries/skills/core/Skill.h
@@ -29,7 +29,8 @@ namespace armarx
         class Skill : public armarx::Logging
         {
         public:
-            using CallbackT = std::function<void(const aron::data::DictPtr&)>;
+            using CallbackT =
+                std::function<void(const SkillStatus s, const armarx::aron::data::DictPtr&)>;
 
             struct InitResult
             {
@@ -160,23 +161,24 @@ namespace armarx
             armarx::core::time::DateTime started = armarx::core::time::DateTime::Invalid();
             armarx::core::time::DateTime exited = armarx::core::time::DateTime::Invalid();
 
-            // parameterization.Will be set from implementation wrapper.
+            // parameterization. Will be set from implementation wrapper.
             // const params after initialization!!
-            std::function<void(const SkillStatus s, const armarx::aron::data::DictPtr&)> callback;
+            CallbackT callback;
             manager::dti::SkillManagerInterfacePrx manager = nullptr;
             std::string executorName = "INVALID EXECUTOR NAME";
 
         protected:
             // non-const params
             mutable std::mutex parametersMutex;
-            armarx::aron::data::DictPtr parameters;
+            armarx::aron::data::DictPtr parameters = nullptr;
 
             // The descripion of the skill
             SkillDescription description;
 
             // active conditions. First is condition (bool return func)
             mutable std::mutex conditionCallbacksMutex;
-            std::vector<std::pair<std::function<bool()>, std::function<void()>>> conditionCallbacks;
+            std::vector<std::pair<std::function<bool()>, std::function<void()>>>
+                conditionCallbacks = {};
 
 
             /// Use conditions this way