diff --git a/rotaryDecoder.cpp b/rotaryDecoder.cpp
index 3506130..23dc01f 100644
--- a/rotaryDecoder.cpp
+++ b/rotaryDecoder.cpp
@@ -188,9 +188,9 @@ uint8_t rotaryDecoder::_read8()
 
 bool rotaryDecoder::_write8(uint8_t value)
 {
-  _wire->beginTransmission(address);
+  _wire->beginTransmission(_address);
   _wire->write(value);
-  return (_wire->endTransmission == 0);
+  return (_wire->endTransmission() == 0);
 }
 
 
diff --git a/rotaryDecoder.h b/rotaryDecoder.h
index 6025816..300cf28 100644
--- a/rotaryDecoder.h
+++ b/rotaryDecoder.h
@@ -54,6 +54,7 @@ class rotaryDecoder
   int32_t   _encoder[4] = { 0, 0, 0, 0 };
 
   uint8_t   _read8();
+  bool      _write8(uint8_t value);
   uint8_t   _address;
   TwoWire * _wire;
 };