diff --git a/src/core/system_parameters/gnss_signal.h b/src/core/system_parameters/gnss_signal.h
index 4922e5399..91b6f7162 100644
--- a/src/core/system_parameters/gnss_signal.h
+++ b/src/core/system_parameters/gnss_signal.h
@@ -51,7 +51,7 @@ 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), "1B" for Galileo E1B, "5X" for Galileo E5a}
+    std::string get_signal_str() const; //!<  Get the satellite signal {"1C" for GPS L1 C/A, "2S" for GPS L2C (M), "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