diff --git a/src/emu/machine/amigafdc.c b/src/emu/machine/amigafdc.c
index 60c97f076f1..e9baf06678c 100644
--- a/src/emu/machine/amigafdc.c
+++ b/src/emu/machine/amigafdc.c
@@ -80,6 +80,7 @@ void amiga_fdc::device_reset()
 	adkcon = 0;
 	dmacon = 0;
 	dskpt = 0;
+	dskbyt = 0;
 	pre_dsklen = 0x4000;
 	dma_value = 0;
 	dma_state = DMA_IDLE;