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-rw-r--r--src/emu/tilemap.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/emu/tilemap.cpp b/src/emu/tilemap.cpp
index c5c0ff16ad3..68653d8915a 100644
--- a/src/emu/tilemap.cpp
+++ b/src/emu/tilemap.cpp
@@ -953,8 +953,8 @@ g_profiler.start(PROFILER_TILEMAP_DRAW);
// flip the tilemap around the center of the visible area
rectangle visarea = screen.visible_area();
- u32 width = visarea.left() + visarea.right() + 1;
- u32 height = visarea.top() + visarea.bottom() + 1;
+ u32 width = visarea.right() - visarea.left() + 1;
+ u32 height = visarea.bottom() - visarea.top() + 1;
// XY scrolling playfield
if (m_scrollrows == 1 && m_scrollcols == 1)