1 files changed, 6 insertions, 1 deletions
diff --git a/src/gallium/auxiliary/util/u_rect.h b/src/gallium/auxiliary/util/u_rect.h
index dea1e1ecff3..221d9188730 100644
--- a/src/gallium/auxiliary/util/u_rect.h
+++ b/src/gallium/auxiliary/util/u_rect.h
@@ -87,7 +87,12 @@ u_rect_possible_intersection(const struct u_rect *a,
       u_rect_find_intersection(a,b);
    }
    else {
-      b->x0 = b->x1 = b->y0 = b->y1 = 0;
+      /*
+       * Note the u_rect_xx tests deal with inclusive coordinates
+       * hence all-zero would not be an empty box.
+       */
+      b->x0 = b->y0 = 0;
+      b->x1 = b->y1 = -1;
    }
 }