diff --git a/firmware/target/arm/as3525/sansa-fuzev2/button-fuzev2.c b/firmware/
index 6a2c7c9..4129d34 100644
--- a/firmware/target/arm/as3525/sansa-fuzev2/button-fuzev2.c
+++ b/firmware/target/arm/as3525/sansa-fuzev2/button-fuzev2.c
@@ -233,14 +233,12 @@ int button_read_device(void)
CCU_IO &= ~(1<<12);

GPIOB_PIN(0) = 1<<0;
- for(delay = 500; delay; delay--)
- nop;
+ udelay(10);

gpiod6 = GPIOD_PIN(6);

GPIOB_PIN(0) = 0;
- for(delay = 240; delay; delay--)
- nop;
+ udelay(5);

if (GPIOC_PIN(1) & 1<<1)
btn |= BUTTON_DOWN;