diff --git a/src/TinyGsmClientA6.h b/src/TinyGsmClientA6.h
index c249352..e20c973 100644
--- a/src/TinyGsmClientA6.h
+++ b/src/TinyGsmClientA6.h
@@ -57,6 +57,8 @@ public:
     init(&modem);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmA6* modem) {
     this->at = modem;
     this->mux = -1;
@@ -120,6 +122,8 @@ public:
   {
     memset(sockets, 0, sizeof(sockets));
   }
+  
+  virtual ~TinyGsmA6() {}
 
   /*
    * Basic functions
diff --git a/src/TinyGsmClientBG96.h b/src/TinyGsmClientBG96.h
index 8d2503f..c54ec08 100644
--- a/src/TinyGsmClientBG96.h
+++ b/src/TinyGsmClientBG96.h
@@ -57,6 +57,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmBG96* modem, uint8_t mux = 1) {
     this->at = modem;
     this->mux = mux;
@@ -124,6 +126,8 @@ private:
 //     : GsmClient(modem, mux)
 //   {}
 //
+//   virtual ~GsmClientSecure(){}
+//
 // public:
 //   virtual int connect(const char *host, uint16_t port, int timeout_s) {
 //     stop();
@@ -142,6 +146,7 @@ public:
   {
     memset(sockets, 0, sizeof(sockets));
   }
+  virtual ~TinyGsmBG96() {}
 
   /*
    * Basic functions
diff --git a/src/TinyGsmClientESP8266.h b/src/TinyGsmClientESP8266.h
index 04764e8..c14ec8b 100644
--- a/src/TinyGsmClientESP8266.h
+++ b/src/TinyGsmClientESP8266.h
@@ -57,6 +57,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmESP8266* modem, uint8_t mux = 1) {
     this->at = modem;
     this->mux = mux;
@@ -119,6 +121,8 @@ public:
     : GsmClient(modem, mux)
   {}
 
+  virtual ~GsmClientSecure() {}
+
 public:
   virtual int connect(const char *host, uint16_t port, int timeout_s) {
     stop();
@@ -138,6 +142,8 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
+  virtual ~TinyGsmESP8266() {}
+
   /*
    * Basic functions
    */
diff --git a/src/TinyGsmClientM590.h b/src/TinyGsmClientM590.h
index 6e26d79..42e6ca0 100644
--- a/src/TinyGsmClientM590.h
+++ b/src/TinyGsmClientM590.h
@@ -57,6 +57,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmM590* modem, uint8_t mux = 1) {
     this->at = modem;
     this->mux = mux;
@@ -119,6 +121,8 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
+  virtual ~TinyGsmM590() {}
+
   /*
    * Basic functions
    */
diff --git a/src/TinyGsmClientM95.h b/src/TinyGsmClientM95.h
index a5a56ea..2f52589 100644
--- a/src/TinyGsmClientM95.h
+++ b/src/TinyGsmClientM95.h
@@ -57,6 +57,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmM95* modem, uint8_t mux = 1) {
     this->at = modem;
     this->mux = mux;
@@ -122,6 +124,8 @@ private:
 //     : GsmClient(modem, mux)
 //   {}
 //
+//   virtual ~GsmClientSecure() {}
+//
 // public:
 //   virtual int connect(const char *host, uint16_t port, int timeout_s) {
 //     stop();
@@ -141,6 +145,8 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
+  virtual ~TinyGsmM95() {}
+
   /*
    * Basic functions
    */
diff --git a/src/TinyGsmClientMC60.h b/src/TinyGsmClientMC60.h
index 31845d5..adac7e9 100644
--- a/src/TinyGsmClientMC60.h
+++ b/src/TinyGsmClientMC60.h
@@ -61,6 +61,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmMC60* modem, uint8_t mux = 1) {
     this->at = modem;
     this->mux = mux;
@@ -126,6 +128,8 @@ private:
 //     : GsmClient(modem, mux)
 //   {}
 //
+//   virtual ~GsmClientSecure(){}
+//
 // public:
 //   virtual int connect(const char *host, uint16_t port, int timeout_s) {
 //     stop();
@@ -145,6 +149,8 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
+  virtual ~TinyGsmMC60() {}
+
   /*
    * Basic functions
    */
diff --git a/src/TinyGsmClientSIM5360.h b/src/TinyGsmClientSIM5360.h
index f28c91e..14d1e61 100644
--- a/src/TinyGsmClientSIM5360.h
+++ b/src/TinyGsmClientSIM5360.h
@@ -62,6 +62,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmSim5360* modem, uint8_t mux = 1) {
     this->at = modem;
     this->mux = mux;
@@ -128,6 +130,8 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
+  virtual ~TinyGsmSim5360(){}
+
   /*
    * Basic functions
    */
@@ -220,7 +224,7 @@ TINY_GSM_MODEM_GET_INFO_ATI()
     delay(3000);
     return true;
   }
-  
+
   bool sleepEnable(bool enable = true) {
     sendAT(GF("+CSCLK="), enable);
     return waitResponse() == 1;
diff --git a/src/TinyGsmClientSIM7000.h b/src/TinyGsmClientSIM7000.h
index b60d716..d6339af 100644
--- a/src/TinyGsmClientSIM7000.h
+++ b/src/TinyGsmClientSIM7000.h
@@ -62,6 +62,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmSim7000* modem, uint8_t mux = 1) {
     this->at = modem;
     this->mux = mux;
@@ -130,6 +132,8 @@ public:
     : GsmClient(modem, mux)
   {}
 
+  virtual ~GsmClientSecure(){}
+
 public:
   virtual int connect(const char *host, uint16_t port, int timeout_s) {
     stop();
@@ -150,6 +154,8 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
+  virtual ~TinyGsmSim7000() {}
+
   /*
    * Basic functions
    */
diff --git a/src/TinyGsmClientSIM800.h b/src/TinyGsmClientSIM800.h
index e29c38e..96016e1 100644
--- a/src/TinyGsmClientSIM800.h
+++ b/src/TinyGsmClientSIM800.h
@@ -63,6 +63,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmSim800* modem, uint8_t mux = 1) {
     this->at = modem;
     this->mux = mux;
@@ -130,6 +132,8 @@ public:
     : GsmClient(modem, mux)
   {}
 
+  virtual ~GsmClientSecure(){}
+
 public:
   virtual int connect(const char *host, uint16_t port, int timeout_s) {
     stop();
@@ -149,6 +153,8 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
+  virtual ~TinyGsmSim800() {}
+
   /*
    * Basic functions
    */
diff --git a/src/TinyGsmClientSIM808.h b/src/TinyGsmClientSIM808.h
index 35754a0..ecd07a1 100644
--- a/src/TinyGsmClientSIM808.h
+++ b/src/TinyGsmClientSIM808.h
@@ -22,6 +22,8 @@ public:
     : TinyGsmSim800(stream)
   {}
 
+  virtual ~TinyGsmSim808(){}
+
   /*
    * GPS location functions
    */
diff --git a/src/TinyGsmClientSaraR4.h b/src/TinyGsmClientSaraR4.h
index 81e0b63..8a1ba36 100644
--- a/src/TinyGsmClientSaraR4.h
+++ b/src/TinyGsmClientSaraR4.h
@@ -58,6 +58,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmSaraR4* modem, uint8_t mux = 0) {
     this->at = modem;
     this->mux = mux;
@@ -134,6 +136,8 @@ public:
     : GsmClient(modem, mux)
   {}
 
+  virtual ~GsmClientSecure(){}
+
 public:
   virtual int connect(const char *host, uint16_t port, int timeout_s) {
     stop();
@@ -160,6 +164,8 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
+  virtual ~TinyGsmSaraR4(){}
+
   /*
    * Basic functions
    */
diff --git a/src/TinyGsmClientSequansMonarch.h b/src/TinyGsmClientSequansMonarch.h
index 7438b63..7810193 100644
--- a/src/TinyGsmClientSequansMonarch.h
+++ b/src/TinyGsmClientSequansMonarch.h
@@ -66,6 +66,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmSequansMonarch* modem, uint8_t mux = 1) {
     this->at = modem;
     this->mux = mux;
@@ -135,6 +137,8 @@ public:
     : GsmClient(modem, mux)
   {}
 
+  virtual ~GsmClientSecure(){}
+
 protected:
   bool          strictSSL = false;
 
@@ -179,6 +183,8 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
+  virtual ~TinyGsmSequansMonarch() {}
+
   /*
    * Basic functions
    */
diff --git a/src/TinyGsmClientUBLOX.h b/src/TinyGsmClientUBLOX.h
index 99b222c..3fa2f25 100644
--- a/src/TinyGsmClientUBLOX.h
+++ b/src/TinyGsmClientUBLOX.h
@@ -58,6 +58,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmUBLOX* modem, uint8_t mux = 0) {
     this->at = modem;
     this->mux = mux;
@@ -134,6 +136,8 @@ public:
     : GsmClient(modem, mux)
   {}
 
+  virtual ~GsmClientSecure(){}
+
 public:
   virtual int connect(const char *host, uint16_t port, int timeout_s) {
     stop();
@@ -160,6 +164,8 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
+  virtual ~TinyGsmUBLOX() {}
+
   /*
    * Basic functions
    */
diff --git a/src/TinyGsmClientXBee.h b/src/TinyGsmClientXBee.h
index 3d35f2b..02d723f 100644
--- a/src/TinyGsmClientXBee.h
+++ b/src/TinyGsmClientXBee.h
@@ -80,6 +80,8 @@ public:
     init(&modem, mux);
   }
 
+  virtual ~GsmClient(){}
+
   bool init(TinyGsmXBee* modem, uint8_t mux = 0) {
     this->at = modem;
     this->mux = mux;
@@ -238,6 +240,8 @@ public:
     : GsmClient(modem, mux)
   {}
 
+  virtual ~GsmClientSecure(){}
+
 public:
   virtual int connect(const char *host, uint16_t port, int timeout_s) {
     // NOTE:  Not caling stop() or yeild() here
@@ -283,6 +287,8 @@ public:
       memset(sockets, 0, sizeof(sockets));
   }
 
+  virtual ~TinyGsmXBee() {}
+
   /*
    * Basic functions
    */