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-rw-r--r--src/devices/sound/mixer.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/devices/sound/mixer.cpp b/src/devices/sound/mixer.cpp
index 3b8435182c4..ba57be9b10c 100644
--- a/src/devices/sound/mixer.cpp
+++ b/src/devices/sound/mixer.cpp
@@ -27,4 +27,6 @@ mixer_device::mixer_device(const machine_config &mconfig, const char *tag, devic
void mixer_device::device_start()
{
+ // register for save states
+ save_item(NAME(m_dummy));
}