diff --git a/mainboard/adl/msm800sev/dts b/mainboard/adl/msm800sev/dts
index 490fbf1733..e52ff53917 100644
--- a/mainboard/adl/msm800sev/dts
+++ b/mainboard/adl/msm800sev/dts
@@ -21,7 +21,7 @@
  */
 
 /{
-	mainboard-vendor = "Advanced Digital Logic";
+	mainboard_vendor = "Advanced Digital Logic";
 	mainboard-name = "MSM800SEV";
 	mainboard_pci_subsystem_vendor = "0x1022";
 	mainboard_pci_subsystem_device = "0x2323";
diff --git a/mainboard/amd/db800/dts b/mainboard/amd/db800/dts
index 5ef63f0db2..1541e7589c 100644
--- a/mainboard/amd/db800/dts
+++ b/mainboard/amd/db800/dts
@@ -19,7 +19,7 @@
  */
 
 /{
-	mainboard-vendor = "AMD";
+	mainboard_vendor = "AMD";
 	mainboard-name = "DB800";
 	mainboard_pci_subsystem_vendor = "0x1022";
 	mainboard_pci_subsystem_device = "0x2323";
diff --git a/mainboard/amd/norwich/dts b/mainboard/amd/norwich/dts
index 230c4d223d..b4ac4a1a1d 100644
--- a/mainboard/amd/norwich/dts
+++ b/mainboard/amd/norwich/dts
@@ -19,7 +19,7 @@
  */
 
 /{
-	mainboard-vendor = "AMD";
+	mainboard_vendor = "AMD";
 	mainboard-name = "NORWICH";
 	mainboard_pci_subsystem_vendor = "0x1022";
 	mainboard_pci_subsystem_device = "0x2323";
diff --git a/mainboard/artecgroup/dbe61/dts b/mainboard/artecgroup/dbe61/dts
index e0ca759412..41fd675cad 100644
--- a/mainboard/artecgroup/dbe61/dts
+++ b/mainboard/artecgroup/dbe61/dts
@@ -73,7 +73,7 @@ end
 */
 
 /{
-	mainboard-vendor = "Artec Group";
+	mainboard_vendor = "Artec Group";
 	mainboard-name = "DBE61";
 	mainboard_pci_subsystem_vendor = "0x1022";
 	mainboard_pci_subsystem_device = "0x2323";
diff --git a/mainboard/artecgroup/dbe62/dts b/mainboard/artecgroup/dbe62/dts
index 3cb817c83a..91c3d247e3 100644
--- a/mainboard/artecgroup/dbe62/dts
+++ b/mainboard/artecgroup/dbe62/dts
@@ -19,7 +19,7 @@
  */
 
 /{
-	mainboard-vendor = "Artec";
+	mainboard_vendor = "Artec";
 	mainboard-name = "DBE62";
 	cpus { };
 	apic@0 {
diff --git a/mainboard/emulation/qemu-x86/dts b/mainboard/emulation/qemu-x86/dts
index 42ea56dafd..9baad5ee86 100644
--- a/mainboard/emulation/qemu-x86/dts
+++ b/mainboard/emulation/qemu-x86/dts
@@ -19,7 +19,7 @@
  */
 
 /{
-	mainboard-vendor = "Emulation";
+	mainboard_vendor = "Emulation";
 	mainboard-name = "QEMU x86";
 	mainboard_pci_subsystem_vendor = "0x15ad";
 	mainboard_pci_subsystem_device = "0x1976";
diff --git a/mainboard/pcengines/alix1c/dts b/mainboard/pcengines/alix1c/dts
index a3eb153c2a..77ac82f6ec 100644
--- a/mainboard/pcengines/alix1c/dts
+++ b/mainboard/pcengines/alix1c/dts
@@ -19,7 +19,7 @@
  */
 
 /{
-	mainboard-vendor = "PC Engines";
+	mainboard_vendor = "PC Engines";
 	mainboard-name = "ALIX1.C";
 	cpus { };
 	apic@0 {
diff --git a/mainboard/pcengines/alix2c3/dts b/mainboard/pcengines/alix2c3/dts
index 1af2944922..d4f2713ef3 100644
--- a/mainboard/pcengines/alix2c3/dts
+++ b/mainboard/pcengines/alix2c3/dts
@@ -19,7 +19,7 @@
  */
 
 /{
-	mainboard-vendor = "PC Engines";
+	mainboard_vendor = "PC Engines";
 	mainboard-name = "ALIX.2C3";
 	cpus { };
 	apic@0 {
diff --git a/util/dtc/flattree.c b/util/dtc/flattree.c
index fd221244e5..3088fe397a 100644
--- a/util/dtc/flattree.c
+++ b/util/dtc/flattree.c
@@ -1353,7 +1353,7 @@ void dt_to_coreboot(FILE *f, struct boot_info *bi, int version, int boot_cpuid_p
 
 	/* special for the root. Emit the names for the mainboard vendor and part # */
 	for_each_property(bi->dt, prop) {
-		if (streq(prop->name, "mainboard-vendor")){
+		if (streq(prop->name, "mainboard_vendor")){
 			found_mainboard_vendor = 1;
 			fprintf(f, "const char *mainboard_vendor = \"%s\";\n", prop->val.val);
 		}
@@ -1372,14 +1372,14 @@ void dt_to_coreboot(FILE *f, struct boot_info *bi, int version, int boot_cpuid_p
 	}
 
 	if (! 	found_mainboard_vendor){
-		die("There is no mainboard-vendor property in the root. Please add one."
+		die("There is no mainboard_vendor property in the root. Please add one."
 			"(and make sure there is a mainboard-name property too");
 	}
 
 	if (! 	found_mainboard_partnumber){
 		die("There is no mainboard-name property in the root. "
 			"Please add one."
-			"(and make sure there is a mainboard-vendor property too");
+			"(and make sure there is a mainboard_vendor property too");
 	}
 
 	switch (found_mainboard_subsys) {