diff --git a/src/gallium/drivers/iris/iris_resource.c b/src/gallium/drivers/iris/iris_resource.c
index 56e5a38529f..f4c8df376c0 100644
--- a/src/gallium/drivers/iris/iris_resource.c
+++ b/src/gallium/drivers/iris/iris_resource.c
@@ -471,8 +471,10 @@ iris_resource_alloc_flags(const struct iris_screen *screen,
                        PIPE_RESOURCE_FLAG_MAP_PERSISTENT))
       flags |= BO_ALLOC_SMEM;
 
-   if (screen->devinfo.verx10 >= 125 && isl_aux_usage_has_ccs(aux_usage))
+   if (screen->devinfo.verx10 >= 125 && isl_aux_usage_has_ccs(aux_usage)) {
+      assert((flags & BO_ALLOC_SMEM) == 0);
       flags |= BO_ALLOC_LMEM;
+   }
 
    if ((templ->bind & PIPE_BIND_SHARED) ||
        util_format_get_num_planes(templ->format) > 1)