diff --git a/HT16K33_driver.cpp b/HT16K33_driver.cpp
index db20266..db0e5d6 100644
--- a/HT16K33_driver.cpp
+++ b/HT16K33_driver.cpp
@@ -40,14 +40,13 @@
 
 
 
-bool HT16K33::writeBytes(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint8_t* data) {
+void HT16K33::writeBytes(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint8_t* data) {
     Wire.beginTransmission(devAddr);
     Wire.write((uint8_t) regAddr);
     for (uint8_t i = 0; i < length; i++) {
         Wire.write((uint8_t) data[i]);
     }
     Wire.endTransmission();
-    return true;
 }
 
 
diff --git a/HT16K33_driver.h b/HT16K33_driver.h
index 835f09d..fed6214 100644
--- a/HT16K33_driver.h
+++ b/HT16K33_driver.h
@@ -77,7 +77,7 @@ class HT16K33 {
 
     virtual void clear();
 
-    bool writeBytes(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint8_t* data);
+    void writeBytes(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint8_t* data);
 
   protected:
     uint8_t _addr;