diff --git a/include/ugv_sdk/details/interface/ranger_interface.hpp b/include/ugv_sdk/details/interface/ranger_interface.hpp
index ee81442..69966f3 100644
--- a/include/ugv_sdk/details/interface/ranger_interface.hpp
+++ b/include/ugv_sdk/details/interface/ranger_interface.hpp
@@ -39,6 +39,8 @@ struct RangerActuatorState {
 /////////////////////////////////////////////////////////////////////////
 
 struct RangerInterface {
+  virtual ~RangerInterface() = default;
+  
   virtual bool Connect(std::string dev_name) = 0;
 
   // robot control
diff --git a/include/ugv_sdk/details/interface/robot_common_interface.hpp b/include/ugv_sdk/details/interface/robot_common_interface.hpp
index 077bf00..cb741da 100644
--- a/include/ugv_sdk/details/interface/robot_common_interface.hpp
+++ b/include/ugv_sdk/details/interface/robot_common_interface.hpp
@@ -45,7 +45,7 @@ struct CommonSensorStateMsgGroup {};
 
 class RobotCommonInterface {
  public:
-  ~RobotCommonInterface() = default;
+  virtual ~RobotCommonInterface() = default;
 
   // functions to be implemented by class AgilexBase
   virtual void EnableCommandedMode() = 0;
diff --git a/include/ugv_sdk/details/robot_base/scout_base.hpp b/include/ugv_sdk/details/robot_base/scout_base.hpp
index 571bc5b..8a57ec7 100644
--- a/include/ugv_sdk/details/robot_base/scout_base.hpp
+++ b/include/ugv_sdk/details/robot_base/scout_base.hpp
@@ -23,7 +23,7 @@ template <typename ParserType>
 class ScoutBase : public AgilexBase<ParserType>, public ScoutInterface {
  public:
   ScoutBase() : AgilexBase<ParserType>(){};
-  ~ScoutBase() = default;
+  virtual ~ScoutBase() = default;
 
   // set up connection
   bool Connect(std::string can_name) override {
diff --git a/src/mobile_robot/scout_robot.cpp b/src/mobile_robot/scout_robot.cpp
index 81e7016..9821e1a 100644
--- a/src/mobile_robot/scout_robot.cpp
+++ b/src/mobile_robot/scout_robot.cpp
@@ -72,7 +72,8 @@ ScoutActuatorState ScoutRobot::GetActuatorState() {
 
 ///////////////////////////////////////////////////////////////////////////
 
-ScoutMiniOmniRobot::ScoutMiniOmniRobot(ProtocolVersion protocol) {
+ScoutMiniOmniRobot::ScoutMiniOmniRobot(ProtocolVersion protocol)
+    : ScoutRobot(ProtocolVersion::UNKONWN) {
   if (protocol == ProtocolVersion::AGX_V1) {
     robot_ = new ScoutMiniOmniBaseV1();
   } else if (protocol == ProtocolVersion::AGX_V2) {