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-rw-r--r--src/mess/machine/c64_16kb.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mess/machine/c64_16kb.h b/src/mess/machine/c64_16kb.h
index be5d7c93c83..401b635d74f 100644
--- a/src/mess/machine/c64_16kb.h
+++ b/src/mess/machine/c64_16kb.h
@@ -45,6 +45,9 @@ protected:
// device_c64_expansion_card_interface overrides
virtual UINT8 c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2);
+
+private:
+ required_ioport m_sw1;
};