diff --git a/intern/cycles/kernel/closure/bsdf_ray_portal.h b/intern/cycles/kernel/closure/bsdf_ray_portal.h
index 39edb6d459d..7f724e054db 100644
--- a/intern/cycles/kernel/closure/bsdf_ray_portal.h
+++ b/intern/cycles/kernel/closure/bsdf_ray_portal.h
@@ -28,12 +28,12 @@ ccl_device void bsdf_ray_portal_setup(ccl_private ShaderData *sd,
   }
 
   sd->closure_transparent_extinction += weight;
-  sd->flag |= SD_BSDF | SD_RAY_PORTAL;
 
   ccl_private RayPortalClosure *pc = (ccl_private RayPortalClosure *)closure_alloc(
       sd, sizeof(RayPortalClosure), CLOSURE_BSDF_RAY_PORTAL_ID, weight);
 
   if (pc) {
+    sd->flag |= SD_BSDF | SD_RAY_PORTAL;
     if (is_zero(direction)) {
       direction = -sd->wi;
     }