diff --git a/src/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp b/src/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
index cc68c04..8526b44 100644
--- a/src/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
+++ b/src/ESP32-HUB75-MatrixPanel-I2S-DMA.cpp
@@ -24,7 +24,7 @@ bool MatrixPanel_I2S_DMA::allocateDMAmemory()
 
         if (ptr->data == nullptr)
         {
-          ESP_LOGE(TAG, "ERROR: Couldn't malloc rowBitStruct %d! Not enough memory for requested PIXEL_COLOUR_DEPTH_BITS. Please reduce colour depth. Critical fail.\r\n", malloc_num);
+          ESP_LOGE(TAG, "CRITICAL ERROR: Can't allocate rowBitStruct %d! Not enough memory for requested PIXEL_COLOUR_DEPTH_BITS. Please reduce PIXEL_COLOUR_DEPTH_BITS value.\r\n", malloc_num);
                     return false;
               // TODO: should we release all previous rowBitStructs here???
         }
diff --git a/src/ESP32-HUB75-MatrixPanel-I2S-DMA.h b/src/ESP32-HUB75-MatrixPanel-I2S-DMA.h
index bccc12f..0dbfd36 100644
--- a/src/ESP32-HUB75-MatrixPanel-I2S-DMA.h
+++ b/src/ESP32-HUB75-MatrixPanel-I2S-DMA.h
@@ -74,8 +74,6 @@
  #define PIXEL_COLOUR_DEPTH_BITS      8
 #endif
 
-#define COLOUR_CHANNELS_PER_PIXEL     3
-
 /***************************************************************************************/
 /* Definitions below should NOT be ever changed without rewriting library logic         */
 #define ESP32_I2S_DMA_STORAGE_TYPE  uint16_t                // DMA output of one uint16_t at a time.