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Diffstat (limited to 'src/devices/bus/nes_ctrl/joypad.cpp')
-rw-r--r--src/devices/bus/nes_ctrl/joypad.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/devices/bus/nes_ctrl/joypad.cpp b/src/devices/bus/nes_ctrl/joypad.cpp
index 0605eea2d9a..1027340cf63 100644
--- a/src/devices/bus/nes_ctrl/joypad.cpp
+++ b/src/devices/bus/nes_ctrl/joypad.cpp
@@ -175,7 +175,8 @@ void nes_arcstick_device::device_add_mconfig(machine_config &config)
{
// expansion port to allow daisy chaining
NES_CONTROL_PORT(config, m_daisychain, arcstick_daisy, nullptr);
- m_daisychain->set_screen_tag(m_port->m_screen);
+ if (m_port != nullptr)
+ m_daisychain->set_screen_tag(m_port->m_screen);
}