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-rw-r--r--src/mame/machine/midyunit.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mame/machine/midyunit.cpp b/src/mame/machine/midyunit.cpp
index 36e5b986b74..5744f4e4758 100644
--- a/src/mame/machine/midyunit.cpp
+++ b/src/mame/machine/midyunit.cpp
@@ -369,6 +369,8 @@ void midyunit_state::init_smashtv()
{
/* common init */
init_generic(6, SOUND_CVSD_SMALL, 0x9cf6, 0x9d21);
+
+ m_prot_data = nullptr;
}