diff --git a/hardware/esp8266com/esp8266/libraries/Wire/Wire.cpp b/hardware/esp8266com/esp8266/libraries/Wire/Wire.cpp
index 03901583c..759159203 100644
--- a/hardware/esp8266com/esp8266/libraries/Wire/Wire.cpp
+++ b/hardware/esp8266com/esp8266/libraries/Wire/Wire.cpp
@@ -55,6 +55,8 @@ TwoWire::TwoWire(){}
 // Public Methods //////////////////////////////////////////////////////////////
 
 void TwoWire::begin(int sda, int scl){
+  default_sda_pin = sda;
+  default_scl_pin = scl;
   twi_init(sda, scl);
   flush();
 }