diff --git a/src/emu/machine/wozfdc.c b/src/emu/machine/wozfdc.c
index 9116b016482..327df3c26bc 100644
--- a/src/emu/machine/wozfdc.c
+++ b/src/emu/machine/wozfdc.c
@@ -552,4 +552,9 @@ void appleiii_fdc::control_dx(int offset)
 		default:    // cod8-c0df are not FDC related
 			break;
 	}
+
+	if (offset < 8)
+	{
+		a3_update_drive_sel(); 
+	}
 }