1 files changed, 6 insertions, 0 deletions
diff --git a/grid.c b/grid.c
index dbb4fe64..f1dc130b 100644
--- a/grid.c
+++ b/grid.c
@@ -292,6 +292,12 @@ grid_expand_line(struct grid *gd, u_int py, u_int sx, u_int bg)
 	if (sx <= gl->cellsize)
 		return;
 
+	if (sx < gd->sx) {
+		sx *= 2;
+		if (sx > gd->sx)
+			sx = gd->sx;
+	}
+
 	gl->celldata = xreallocarray(gl->celldata, sx, sizeof *gl->celldata);
 	for (xx = gl->cellsize; xx < sx; xx++)
 		grid_clear_cell(gd, xx, py, bg);