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-rw-r--r--src/emu/validity.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/emu/validity.h b/src/emu/validity.h
index 3e6ff8e5a00..54687716bd7 100644
--- a/src/emu/validity.h
+++ b/src/emu/validity.h
@@ -109,6 +109,7 @@ private:
int_map m_region_map;
string_set m_ioport_set;
string_set m_already_checked;
+ string_set m_slotcard_set;
bool m_checking_card;
bool const m_quick;
};