diff --git a/src/core/system_parameters/gnss_satellite.h b/src/core/system_parameters/gnss_satellite.h
index 519deb671..064b34b2e 100644
--- a/src/core/system_parameters/gnss_satellite.h
+++ b/src/core/system_parameters/gnss_satellite.h
@@ -47,18 +47,19 @@
 class Gnss_Satellite
 {
 public:
-    Gnss_Satellite();                                                       //!< Default Constructor.
-    Gnss_Satellite(const std::string& system_, uint32_t PRN_);              //!< Concrete GNSS satellite Constructor.
-    ~Gnss_Satellite();                                                      //!< Default Destructor.
-    void update_PRN(uint32_t PRN);                                          //!< Updates the PRN Number when information is decoded, only applies to GLONASS GNAV messages
-    uint32_t get_PRN() const;                                               //!< Gets satellite's PRN
-    int32_t get_rf_link() const;                                            //!< Gets the satellite's rf link
-    std::string get_system() const;                                         //!< Gets the satellite system {"GPS", "GLONASS", "SBAS", "Galileo", "Beidou"}
-    std::string get_system_short() const;                                   //!< Gets the satellite system {"G", "R", "SBAS", "E", "C"}
-    std::string get_block() const;                                          //!< Gets the satellite block. If GPS, returns {"IIA", "IIR", "IIR-M", "IIF"}
-    std::string what_block(const std::string& system_, uint32_t PRN_);      //!< Gets the block of a given satellite
-    friend bool operator==(const Gnss_Satellite&, const Gnss_Satellite&);   //!< operator== for comparison
-    friend std::ostream& operator<<(std::ostream&, const Gnss_Satellite&);  //!< operator<< for pretty printing
+    Gnss_Satellite();                                                   //!< Default Constructor.
+    Gnss_Satellite(const std::string& system_, uint32_t PRN_);          //!< Concrete GNSS satellite Constructor.
+    ~Gnss_Satellite();                                                  //!< Default Destructor.
+    void update_PRN(uint32_t PRN);                                      //!< Updates the PRN Number when information is decoded, only applies to GLONASS GNAV messages
+    uint32_t get_PRN() const;                                           //!< Gets satellite's PRN
+    int32_t get_rf_link() const;                                        //!< Gets the satellite's rf link
+    std::string get_system() const;                                     //!< Gets the satellite system {"GPS", "GLONASS", "SBAS", "Galileo", "Beidou"}
+    std::string get_system_short() const;                               //!< Gets the satellite system {"G", "R", "SBAS", "E", "C"}
+    std::string get_block() const;                                      //!< Gets the satellite block. If GPS, returns {"IIA", "IIR", "IIR-M", "IIF"}
+    std::string what_block(const std::string& system_, uint32_t PRN_);  //!< Gets the block of a given satellite
+
+    friend bool operator==(const Gnss_Satellite& /*sat1*/, const Gnss_Satellite& /*sat2*/);  //!< operator== for comparison
+    friend std::ostream& operator<<(std::ostream& /*out*/, const Gnss_Satellite& /*sat*/);   //!< operator<< for pretty printing
     //Gnss_Satellite& operator=(const Gnss_Satellite &);
 private:
     uint32_t PRN;
diff --git a/src/core/system_parameters/gnss_signal.h b/src/core/system_parameters/gnss_signal.h
index 2b739c633..a2abc773f 100644
--- a/src/core/system_parameters/gnss_signal.h
+++ b/src/core/system_parameters/gnss_signal.h
@@ -52,10 +52,11 @@ public:
     Gnss_Signal(const std::string& signal_);
     Gnss_Signal(const Gnss_Satellite& satellite_, const std::string& signal_);
     ~Gnss_Signal();
-    std::string get_signal_str() const;                                  //!< Get the satellite signal {"1C" for GPS L1 C/A, "2S" for GPS L2C (M), "L5" for GPS L5, "1G" for GLONASS L1 C/A, "1B" for Galileo E1B, "5X" for Galileo E5a.
-    Gnss_Satellite get_satellite() const;                                //!< Get the Gnss_Satellite associated to the signal
-    friend bool operator==(const Gnss_Signal&, const Gnss_Signal&);      //!< operator== for comparison
-    friend std::ostream& operator<<(std::ostream&, const Gnss_Signal&);  //!< operator<< for pretty printing
+    std::string get_signal_str() const;    //!< Get the satellite signal {"1C" for GPS L1 C/A, "2S" for GPS L2C (M), "L5" for GPS L5, "1G" for GLONASS L1 C/A, "1B" for Galileo E1B, "5X" for Galileo E5a.
+    Gnss_Satellite get_satellite() const;  //!< Get the Gnss_Satellite associated to the signal
+
+    friend bool operator==(const Gnss_Signal& /*sig1*/, const Gnss_Signal& /*sig2*/);    //!< operator== for comparison
+    friend std::ostream& operator<<(std::ostream& /*out*/, const Gnss_Signal& /*sig*/);  //!< operator<< for pretty printing
 };
 
 #endif