diff --git a/libraries/WiFiS3/src/Modem.cpp b/libraries/WiFiS3/src/Modem.cpp
index d5d53ead..1d40809a 100644
--- a/libraries/WiFiS3/src/Modem.cpp
+++ b/libraries/WiFiS3/src/Modem.cpp
@@ -10,13 +10,13 @@
 using namespace std;
 
 /* -------------------------------------------------------------------------- */
-ModemClass::ModemClass(int tx, int rx) : beginned(false), delete_serial(false), _timeout(MODEM_TIMEOUT), trim_results(true), read_by_size(false) {
+ModemClass::ModemClass(int tx, int rx) : beginned(false), delete_serial(false), _timeout(MODEM_TIMEOUT), trim_results(true) {
 /* -------------------------------------------------------------------------- */
    _serial = new UART(tx,rx);
 }
 
 /* -------------------------------------------------------------------------- */
-ModemClass::ModemClass(UART * serial) : beginned(false) , delete_serial(true) , _serial(serial), _timeout(MODEM_TIMEOUT), trim_results(true), read_by_size(false) {
+ModemClass::ModemClass(UART * serial) : beginned(false) , delete_serial(true) , _serial(serial), _timeout(MODEM_TIMEOUT), trim_results(true) {
 /* -------------------------------------------------------------------------- */
 }
 
diff --git a/libraries/WiFiS3/src/Modem.h b/libraries/WiFiS3/src/Modem.h
index d6995885..3f785bc9 100644
--- a/libraries/WiFiS3/src/Modem.h
+++ b/libraries/WiFiS3/src/Modem.h
@@ -35,7 +35,7 @@ class ModemClass {
   }
 
   void read_using_size() {
-    read_by_size = true;
+    // read_by_size = true; // deprecated
   }
   bool beginned;
 
@@ -79,8 +79,6 @@ class ModemClass {
   unsigned long _timeout;
   uint8_t tx_buff[MAX_BUFF_SIZE];
   bool trim_results;
-  bool read_by_size;
-  bool read_by_size_finished(std::string &rx);
   Stream * _serial_debug;
   uint8_t _debug_level = 0;
 };