diff --git a/libn3ds/source/arm11/drivers/codec.c b/libn3ds/source/arm11/drivers/codec.c
index 9081982..657b939 100644
--- a/libn3ds/source/arm11/drivers/codec.c
+++ b/libn3ds/source/arm11/drivers/codec.c
@@ -762,7 +762,7 @@ bool CODEC_getRawAdcData(CdcAdcData *data)
 void CODEC_soundSwitchOutput(void)
 {
 	static u8 headset = 0;
-	u8 state = readReg(CDC_REG_100_44) & 1u;
+	u8 state = GPIO_read(GPIO_2_HEADPH_JACK) & 1u;
 	if( state != headset )
 	{
 		headset = state;