diff --git a/src/gallium/drivers/llvmpipe/lp_setup_tri.c b/src/gallium/drivers/llvmpipe/lp_setup_tri.c
index 007a1f5b73e..c1fc054b092 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_tri.c
+++ b/src/gallium/drivers/llvmpipe/lp_setup_tri.c
@@ -403,7 +403,8 @@ do_triangle_ccw(struct lp_setup_context *setup,
        key->num_inputs == 1 &&
        (key->inputs[0].interp == LP_INTERP_LINEAR ||
         key->inputs[0].interp == LP_INTERP_PERSPECTIVE) &&
-        setup->fs.current_tex_num == 0) {
+        setup->fs.current_tex_num == 0 &&
+        setup->cullmode == 0) {
       float dist0 = v0[0][0] * v0[0][0] + v0[0][1] * v0[0][1];
       float dist1 = v1[0][0] * v1[0][0] + v1[0][1] * v1[0][1];
       float dist2 = v2[0][0] * v2[0][0] + v2[0][1] * v2[0][1];