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Diffstat (limited to 'src/mess/video/nes.c')
-rw-r--r--src/mess/video/nes.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mess/video/nes.c b/src/mess/video/nes.c
index 64cb116df1e..0105c740e2b 100644
--- a/src/mess/video/nes.c
+++ b/src/mess/video/nes.c
@@ -50,7 +50,7 @@ UINT32 nes_state::screen_update_nes(screen_device &screen, bitmap_ind16 &bitmap,
m_last_frame_flip = 1;
}
- if (!m_io_disksel->read_safe(1) & 0x01)
+ if (!(m_io_disksel->read_safe(1) & 0x01))
m_last_frame_flip = 0;
}
return 0;