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-rw-r--r--src/mess/drivers/simon.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mess/drivers/simon.c b/src/mess/drivers/simon.c
index eb3a0d6d63f..f10560e3386 100644
--- a/src/mess/drivers/simon.c
+++ b/src/mess/drivers/simon.c
@@ -66,7 +66,7 @@ READ8_MEMBER(simon_state::read_k)
for (int i = 0; i < 4; i++)
{
const int r[4] = { 0, 1, 2, 9 };
- if (m_r & (1 << r[i]))
+ if (m_r >> r[i] & 1)
k |= m_button_matrix[i]->read();
}