diff --git a/src/mame/machine/segaic16.c b/src/mame/machine/segaic16.c
index 8be3077484b..39094931feb 100644
--- a/src/mame/machine/segaic16.c
+++ b/src/mame/machine/segaic16.c
@@ -216,7 +216,7 @@ static void memory_mapper_w(const address_space *space, struct memory_mapper_chi
 			if ((oldval ^ chip->regs[offset]) & 3)
 			{
 				if ((chip->regs[offset] & 3) == 3)
-					fd1094_machine_init(space->machine->cpu[0]);
+					fd1094_machine_init(chip->cpu);
 
 				/* fd1094_machine_init calls device_reset on the CPU, so we must do this afterwards */
 				cpu_set_input_line(chip->cpu, INPUT_LINE_RESET, (chip->regs[offset] & 3) == 3 ? ASSERT_LINE : CLEAR_LINE);