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-rw-r--r--src/emu/addrmap.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/addrmap.cpp b/src/emu/addrmap.cpp
index 794d6e895ec..aaf52340e64 100644
--- a/src/emu/addrmap.cpp
+++ b/src/emu/addrmap.cpp
@@ -98,7 +98,7 @@ address_map_entry &address_map_entry::mask(offs_t _mask)
address_map_entry &address_map_entry::umask16(u16 _mask)
{
- m_mask = (u64(_mask) << 48) | (u64(_mask) << 32) | (_mask << 16) | _mask;
+ m_mask = (u64(_mask) << 48) | (u64(_mask) << 32) | (u64(_mask) << 16) | _mask;
return *this;
}