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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;