diff --git a/Adafruit_TSL2561.cpp b/Adafruit_TSL2561.cpp
index 892cfe8..6b8cf77 100644
--- a/Adafruit_TSL2561.cpp
+++ b/Adafruit_TSL2561.cpp
@@ -29,22 +29,6 @@
 /*                          PRIVATE FUNCTIONS                             */
 /*========================================================================*/
 
-/**************************************************************************/
-/*!
-    @brief  Sends a single command byte over I2C
-*/
-/**************************************************************************/
-void Adafruit_TSL2561::writeCmd (uint8_t cmd)
-{
-  Wire.beginTransmission(_addr);
-  #if ARDUINO >= 100
-  Wire.write(cmd);
-  #else
-  Wire.send(cmd);
-  #endif
-  Wire.endTransmission();
-}
-
 /**************************************************************************/
 /*!
     @brief  Writes a register and an 8 bit value over I2C
diff --git a/Adafruit_TSL2561.h b/Adafruit_TSL2561.h
index 7b921c9..e63f42f 100644
--- a/Adafruit_TSL2561.h
+++ b/Adafruit_TSL2561.h
@@ -195,7 +195,6 @@ class Adafruit_TSL2561 : public Adafruit_Sensor {
   
   void     enable (void);
   void     disable (void);
-  void     writeCmd (uint8_t cmd);
   void     write8 (uint8_t reg, uint32_t value);
   uint8_t  read8 (uint8_t reg);
   uint16_t read16 (uint8_t reg);