diff --git a/src/mess/drivers/trs80m2.c b/src/mess/drivers/trs80m2.c
index 8a3ad2420bd..f726116d2fa 100644
--- a/src/mess/drivers/trs80m2.c
+++ b/src/mess/drivers/trs80m2.c
@@ -533,8 +533,8 @@ static Z80DMA_INTERFACE( dma_intf )
 	DEVCB_CPU_INPUT_LINE(Z80_TAG, INPUT_LINE_HALT),
 	DEVCB_CPU_INPUT_LINE(Z80_TAG, INPUT_LINE_IRQ0),
 	DEVCB_NULL,
-	DEVCB_MEMORY_HANDLER(Z80_TAG, PROGRAM, memory_read_byte),
-	DEVCB_MEMORY_HANDLER(Z80_TAG, PROGRAM, memory_write_byte),
+	DEVCB_DRIVER_MEMBER(trs80m2_state, read),
+	DEVCB_DRIVER_MEMBER(trs80m2_state, write),
 	DEVCB_MEMORY_HANDLER(Z80_TAG, IO, memory_read_byte),
 	DEVCB_MEMORY_HANDLER(Z80_TAG, IO, memory_write_byte)
 };