diff --git a/src/gallium/auxiliary/util/u_transfer.h b/src/gallium/auxiliary/util/u_transfer.h
index 3412e13c3cc..52191512ac7 100644
--- a/src/gallium/auxiliary/util/u_transfer.h
+++ b/src/gallium/auxiliary/util/u_transfer.h
@@ -93,7 +93,7 @@ struct u_resource_vtbl {
 
 struct u_resource {
    struct pipe_resource b;
-   struct u_resource_vtbl *vtbl;
+   const struct u_resource_vtbl *vtbl;
 };