diff --git a/gfx/cairo/cairo/src/cairo-image-surface.c b/gfx/cairo/cairo/src/cairo-image-surface.c
--- a/gfx/cairo/cairo/src/cairo-image-surface.c
+++ b/gfx/cairo/cairo/src/cairo-image-surface.c
@@ -1797,17 +1797,17 @@ _cairo_image_surface_fixup_unbounded_box
 					    cairo_boxes_t *boxes)
 {
     cairo_boxes_t clear;
     cairo_box_t box;
     cairo_status_t status;
     struct _cairo_boxes_chunk *chunk;
     int i;
 
-    if (boxes->num_boxes <= 1 && clip_region == NULL)
+    if (boxes->num_boxes < 1 && clip_region == NULL)
 	return _cairo_image_surface_fixup_unbounded (dst, extents, NULL);
 
     _cairo_boxes_init (&clear);
 
     box.p1.x = _cairo_fixed_from_int (extents->unbounded.x + extents->unbounded.width);
     box.p1.y = _cairo_fixed_from_int (extents->unbounded.y);
     box.p2.x = _cairo_fixed_from_int (extents->unbounded.x);
     box.p2.y = _cairo_fixed_from_int (extents->unbounded.y + extents->unbounded.height);