diff --git a/config/coreboot/kcma-d8-udimm_16mb/target.cfg b/config/coreboot/kcma-d8-udimm_16mb/target.cfg
index a8a4a5f..35354c2 100644
--- a/config/coreboot/kcma-d8-udimm_16mb/target.cfg
+++ b/config/coreboot/kcma-d8-udimm_16mb/target.cfg
@@ -1,4 +1,5 @@
 tree="fam15h_udimm"
+xtree="fam15h_rdimm"
 xarch="i386-elf"
 payload_grub="y"
 payload_grub_withseabios="y"
diff --git a/config/coreboot/kcma-d8-udimm_2mb/target.cfg b/config/coreboot/kcma-d8-udimm_2mb/target.cfg
index a8a4a5f..35354c2 100644
--- a/config/coreboot/kcma-d8-udimm_2mb/target.cfg
+++ b/config/coreboot/kcma-d8-udimm_2mb/target.cfg
@@ -1,4 +1,5 @@
 tree="fam15h_udimm"
+xtree="fam15h_rdimm"
 xarch="i386-elf"
 payload_grub="y"
 payload_grub_withseabios="y"
diff --git a/config/coreboot/kgpe-d16-udimm_16mb/target.cfg b/config/coreboot/kgpe-d16-udimm_16mb/target.cfg
index 9bd20d4..5b4010d 100644
--- a/config/coreboot/kgpe-d16-udimm_16mb/target.cfg
+++ b/config/coreboot/kgpe-d16-udimm_16mb/target.cfg
@@ -1,4 +1,5 @@
 tree="fam15h_udimm"
+xtree="fam15h_rdimm"
 xarch="i386-elf"
 payload_seabios="y"
 payload_seabios_withgrub="y"
diff --git a/config/coreboot/kgpe-d16-udimm_2mb/target.cfg b/config/coreboot/kgpe-d16-udimm_2mb/target.cfg
index 9bd20d4..5b4010d 100644
--- a/config/coreboot/kgpe-d16-udimm_2mb/target.cfg
+++ b/config/coreboot/kgpe-d16-udimm_2mb/target.cfg
@@ -1,4 +1,5 @@
 tree="fam15h_udimm"
+xtree="fam15h_rdimm"
 xarch="i386-elf"
 payload_seabios="y"
 payload_seabios_withgrub="y"