diff --git a/icd/intel/shader.c b/icd/intel/shader.c
index b82982c..4880039 100644
--- a/icd/intel/shader.c
+++ b/icd/intel/shader.c
@@ -52,10 +52,12 @@
         sh->uses |= INTEL_SHADER_USE_VID;
         sh->in_count = 1;
         sh->out_count = 2;
+        sh->urb_grf_start = 1;
         break;
     case 'w':
         sh->out_count = 1;
         sh->surface_count = 1;
+        sh->urb_grf_start = 2;
         break;
     default:
         break;