diff --git a/src/emu/cpu/h6280/h6280.c b/src/emu/cpu/h6280/h6280.c
index c03b80ff383..e187bb5ee41 100644
--- a/src/emu/cpu/h6280/h6280.c
+++ b/src/emu/cpu/h6280/h6280.c
@@ -206,6 +206,7 @@ static CPU_RESET( h6280 )
 	h6280.irq_callback = save_irqcallback;
 	h6280.device = device;
 	h6280.program = memory_find_address_space(device, ADDRESS_SPACE_PROGRAM);
+	h6280.io = memory_find_address_space(device, ADDRESS_SPACE_IO);
 
 	/* set I and B flags */
 	P = _fI | _fB;