diff --git a/src/emu/machine/idehd.c b/src/emu/machine/idehd.c
index ffb9a026ea8..2cd59aa0892 100644
--- a/src/emu/machine/idehd.c
+++ b/src/emu/machine/idehd.c
@@ -394,7 +394,7 @@ void ata_mass_storage_device::fill_buffer()
 		{
 			set_dasp(ASSERT_LINE);
 
-			start_busy(TIME_BETWEEN_SECTORS, PARAM_COMMAND);
+			start_busy(TIME_PER_SECTOR, PARAM_COMMAND);
 		}
 		break;
 	}