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-rw-r--r--src/devices/bus/vic20/exp.cpp1
1 files changed, 0 insertions, 1 deletions
diff --git a/src/devices/bus/vic20/exp.cpp b/src/devices/bus/vic20/exp.cpp
index e70bda544bc..535375536be 100644
--- a/src/devices/bus/vic20/exp.cpp
+++ b/src/devices/bus/vic20/exp.cpp
@@ -219,6 +219,5 @@ SLOT_INTERFACE_START( vic20_expansion_cards )
// the following need ROMs from the software list
SLOT_INTERFACE_INTERNAL("standard", VIC20_STD)
SLOT_INTERFACE_INTERNAL("ieee488", VIC1112)
- MCFG_SLOT_OPTION_CLOCK("ieee488", DERIVED_CLOCK(1, 1))
SLOT_INTERFACE_INTERNAL("megacart", VIC20_MEGACART)
SLOT_INTERFACE_END