diff --git a/Adafruit_BusIO_Register.cpp b/Adafruit_BusIO_Register.cpp
index 142fb30..fb4735a 100644
--- a/Adafruit_BusIO_Register.cpp
+++ b/Adafruit_BusIO_Register.cpp
@@ -329,6 +329,6 @@ void Adafruit_BusIO_Register::setAddress(uint16_t address) {
  *    @brief  Set the width of register address
  *    @param address_width the width for register address
  */
-void Adafruit_BusIO_Register::setAddressWidth(uint16_t adress_width) {
-  _addrwidth = adress_width;
+void Adafruit_BusIO_Register::setAddressWidth(uint16_t address_width) {
+  _addrwidth = address_width;
 }
diff --git a/Adafruit_BusIO_Register.h b/Adafruit_BusIO_Register.h
index 0002dd1..bc27e5f 100644
--- a/Adafruit_BusIO_Register.h
+++ b/Adafruit_BusIO_Register.h
@@ -57,7 +57,7 @@ public:
 
   void setWidth(uint8_t width);
   void setAddress(uint16_t address);
-  void setAddressWidth(uint16_t adress_width);
+  void setAddressWidth(uint16_t address_width);
 
   void print(Stream *s = &Serial);
   void println(Stream *s = &Serial);