diff --git a/src/gallium/drivers/r300/r300_render.c b/src/gallium/drivers/r300/r300_render.c
index b31141a..3b4ba3a 100644
--- a/src/gallium/drivers/r300/r300_render.c
+++ b/src/gallium/drivers/r300/r300_render.c
@@ -778,6 +778,8 @@ static void r300_draw_vbo(struct pipe_context* pipe,
 
     r300_update_derived_state(r300);
 
+    u_vbuf_mgr_draw_optimize(r300->vbuf_mgr, &r300->index_buffer, dinfo, &info);
+
     /* Start the vbuf manager and update buffers if needed. */
     if (u_vbuf_mgr_draw_begin(r300->vbuf_mgr, &info) & U_VBUF_BUFFERS_UPDATED) {
         r300->vertex_arrays_dirty = TRUE;