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-rw-r--r--src/emu/video/mc6845.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/video/mc6845.c b/src/emu/video/mc6845.c
index 3f3789b9334..22ff53b9eb8 100644
--- a/src/emu/video/mc6845.c
+++ b/src/emu/video/mc6845.c
@@ -961,7 +961,7 @@ UINT32 mc6845_device::screen_update(screen_device &screen, bitmap_rgb32 &bitmap,
if (m_has_valid_parameters)
{
- assert(m_update_row_cb.isnull() != NULL);
+ assert(!m_update_row_cb.isnull());
/* call the set up function if any */
if (!m_begin_update_cb.isnull())