diff --git a/variants/t-deck/variant.h b/variants/t-deck/variant.h
index 72320fc24..d754834ed 100644
--- a/variants/t-deck/variant.h
+++ b/variants/t-deck/variant.h
@@ -75,7 +75,7 @@
 #define DAC_I2S_BCK 7
 #define DAC_I2S_WS 5
 #define DAC_I2S_DOUT 6
-#define DAC_I2S_MCLK 48 // GPIO mclk mic
+#define DAC_I2S_MCLK 21 // GPIO lrck mic
 
 // LoRa
 #define USE_SX1262