diff --git a/config/coreboot/fam15h_udimm/target.cfg b/config/coreboot/fam15h_udimm/target.cfg
index 06c4059..c3c7660 100644
--- a/config/coreboot/fam15h_udimm/target.cfg
+++ b/config/coreboot/fam15h_udimm/target.cfg
@@ -1,3 +1,4 @@
 tree="fam15h_udimm"
 tree_depend="fam15h_rdimm"
+xtree="fam15h_rdimm"
 rev="1c13f8d85c7306213cd525308ee8973e5663a3f8"