diff --git a/ESP32-HUB75-MatrixPanel-I2S-DMA.h b/ESP32-HUB75-MatrixPanel-I2S-DMA.h
index 0a39538..d9b029a 100644
--- a/ESP32-HUB75-MatrixPanel-I2S-DMA.h
+++ b/ESP32-HUB75-MatrixPanel-I2S-DMA.h
@@ -259,7 +259,7 @@ struct  HUB75_I2S_CFG {
   /**
    * I2S clock speed selector
    */
-  enum clk_speed {HZ_10M=10000000, HZ_20M=20000000};
+  enum clk_speed {HZ_8M=8000000, HZ_10M=10000000, HZ_20M=20000000};
 
   // Structure Variables