diff --git a/src/gallium/drivers/iris/iris_batch.c b/src/gallium/drivers/iris/iris_batch.c
index 1d94cf86a41..d11fa2e54c8 100644
--- a/src/gallium/drivers/iris/iris_batch.c
+++ b/src/gallium/drivers/iris/iris_batch.c
@@ -520,6 +520,7 @@ add_aux_map_bos_to_batch(struct iris_batch *batch)
             .flags = bo->kflags,
          };
       batch->aperture_space += bo->size;
+      bo->index = batch->exec_count;
       batch->exec_count++;
    }
 }