diff --git a/src/mame/drivers/amstr_pc.cpp b/src/mame/drivers/amstr_pc.cpp
index 92bab2b40c8..5542f2056ce 100644
--- a/src/mame/drivers/amstr_pc.cpp
+++ b/src/mame/drivers/amstr_pc.cpp
@@ -111,8 +111,10 @@ ADDRESS_MAP_START(amstrad_pc_state::pc200_io)
 	AM_RANGE(0x0078, 0x0079) AM_READWRITE8(pc1640_mouse_x_r, pc1640_mouse_x_w, 0xffff)
 	AM_RANGE(0x007a, 0x007b) AM_READWRITE8(pc1640_mouse_y_r, pc1640_mouse_y_w, 0xffff)
 	AM_RANGE(0x0200, 0x0207) AM_DEVREADWRITE8("pc_joy", pc_joy_device, joy_port_r, joy_port_w, 0xffff)
-	AM_RANGE(0x0278, 0x027b) AM_READ8(pc200_port278_r, 0xffff) AM_DEVWRITE8("lpt_2", pc_lpt_device, write, 0x00ff)
-	AM_RANGE(0x0378, 0x037b) AM_READ8(pc200_port378_r, 0xffff) AM_DEVWRITE8("lpt_1", pc_lpt_device, write, 0x00ff)
+	AM_RANGE(0x0278, 0x027b) AM_READ8(pc200_port278_r, 0xffff)
+	AM_RANGE(0x0278, 0x027b) AM_DEVWRITE8("lpt_2", pc_lpt_device, write, 0x00ff)
+	AM_RANGE(0x0378, 0x037b) AM_READ8(pc200_port378_r, 0xffff)
+	AM_RANGE(0x0378, 0x037b) AM_DEVWRITE8("lpt_1", pc_lpt_device, write, 0x00ff)
 	AM_RANGE(0x03bc, 0x03bf) AM_DEVREADWRITE8("lpt_0", pc_lpt_device, read, write, 0x00ff)
 ADDRESS_MAP_END