diff --git a/src/mesa/pipe/cell/spu/spu_vertex_shader.c b/src/mesa/pipe/cell/spu/spu_vertex_shader.c
index 82165501c5c..125b2c3a436 100644
--- a/src/mesa/pipe/cell/spu/spu_vertex_shader.c
+++ b/src/mesa/pipe/cell/spu/spu_vertex_shader.c
@@ -93,7 +93,8 @@ run_vertex_program(struct spu_vs_context *draw,
 
    assert(count <= 4);
 
-   /* Consts does not require 16 byte alignment. */
+   machine->Processor = TGSI_PROCESSOR_VERTEX;
+
    ASSERT_ALIGN16(draw->constants);
    machine->Consts = (float (*)[4]) draw->constants;