diff --git a/Arduino/LEDstream_FastLED/LEDstream_FastLED.ino b/Arduino/LEDstream_FastLED/LEDstream_FastLED.ino
index 28c0af3..d53f816 100644
--- a/Arduino/LEDstream_FastLED/LEDstream_FastLED.ino
+++ b/Arduino/LEDstream_FastLED/LEDstream_FastLED.ino
@@ -25,12 +25,13 @@
 static const uint16_t 
 	Num_Leds   =  80;        // strip length
 static const uint8_t
-	Led_Pin    =  6,         // Arduino data output pin
 	Brightness =  255;       // maximum brightness
 
 // --- FastLED Setings
 #define LED_TYPE     WS2812B // led strip type for FastLED
 #define COLOR_ORDER  GRB     // color order for bitbang
+#define PIN_DATA     6       // led data output pin
+//#define PIN_CLOCK  7       // led data clock pin (uncomment if you're using a 4-wire LED type)
 
 // --- Serial Settings
 static const unsigned long
@@ -122,7 +123,12 @@ void setup(){
 		pinMode(DEBUG_FPS, OUTPUT);
 	#endif
 
-	FastLED.addLeds<LED_TYPE, Led_Pin, COLOR_ORDER>(leds, Num_Leds);
+	#ifdef PIN_CLOCK
+		FastLED.addLeds<LED_TYPE, PIN_DATA, PIN_CLOCK, COLOR_ORDER>(leds, Num_Leds);
+	#else
+		FastLED.addLeds<LED_TYPE, PIN_DATA, COLOR_ORDER>(leds, Num_Leds);
+	#endif
+	
 	FastLED.setBrightness(Brightness);
 
 	#ifdef CLEAR_ON_START
diff --git a/README.md b/README.md
index 5157a8b..d8d4b45 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,8 @@ Open the LEDstream_FastLED file in the Arduino IDE and customize the settings at
 - LED data pin
 - LED type
 
+If you are using a 4-wire LED chipset like APA102, you will need to uncomment the `PIN_CLOCK` line and set that as well.
+
 Upload to your Arduino and use a corresponding PC application to stream color data. You can get the Processing files from the [main Adalight repository](https://github.com/adafruit/Adalight), though I would recommend using [Patrick Siegler's](https://github.com/psieg/) fork of Lightpacks's Prismatik, which you can find [here](https://github.com/psieg/Lightpack/releases).
 
 ## Additional Settings