diff --git a/src/mess/machine/nes_slot.c b/src/mess/machine/nes_slot.c
index a6411dfe653..0cbf5689841 100644
--- a/src/mess/machine/nes_slot.c
+++ b/src/mess/machine/nes_slot.c
@@ -786,8 +786,6 @@ void device_nes_cart_interface::nes_banks_restore()
 
 	for (int i = 0; i < 4; i++)
 		set_nt_page(i, m_nt_src[i], m_nt_orig[i] / 0x400, m_nt_writable[i]);
-
-	set_nt_mirroring(m_mirroring);
 }