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-rw-r--r--shared-module/displayio/TileGrid.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/shared-module/displayio/TileGrid.c b/shared-module/displayio/TileGrid.c
index 0b0e0479c..a623a10de 100644
--- a/shared-module/displayio/TileGrid.c
+++ b/shared-module/displayio/TileGrid.c
@@ -273,7 +273,7 @@ void common_hal_displayio_tilegrid_set_tile(displayio_tilegrid_t *self, uint16_t
tile_area->y2 = tile_area->y1 + self->tile_height;
if (self->partial_change) {
- displayio_area_expand(&self->dirty_area, &temp_area);
+ displayio_area_union(&self->dirty_area, &temp_area, &self->dirty_area);
}
self->partial_change = true;