3 files changed, 5 insertions, 5 deletions
diff --git a/src/superio/acpi/pnp_generic.asl b/src/superio/acpi/pnp_generic.asl
index c878827cbd..980404efdd 100644
--- a/src/superio/acpi/pnp_generic.asl
+++ b/src/superio/acpi/pnp_generic.asl
@@ -95,7 +95,7 @@ Device (SUPERIO_ID(PN, SUPERIO_PNP_LDN)) {
 	}
 #endif
 
-	Method (_CRS)
+	Method (_CRS, 0, Serialized)
 	{
 		Name (CRS, ResourceTemplate () {
 #ifdef SUPERIO_PNP_IO0
diff --git a/src/superio/acpi/pnp_kbc.asl b/src/superio/acpi/pnp_kbc.asl
index db81ea2185..cbcfd55910 100644
--- a/src/superio/acpi/pnp_kbc.asl
+++ b/src/superio/acpi/pnp_kbc.asl
@@ -73,7 +73,7 @@ Device (SUPERIO_ID(KBD, SUPERIO_KBC_LDN)) {
 		PNP_DEFAULT_PSC
 	}
 
-	Method (_CRS)
+	Method (_CRS, 0, Serialized)
 	{
 		Name (CRS, ResourceTemplate () {
 			IO (Decode16, 0x0000, 0x0000, 0x01, 0x01, IO0)
@@ -133,7 +133,7 @@ Device (SUPERIO_ID(PS2, SUPERIO_KBC_LDN)) {
 		Return (^^SUPERIO_ID(KBD, SUPERIO_KBC_LDN)._PSC ())
 	}
 
-	Method (_CRS)
+	Method (_CRS, 0, Serialized)
 	{
 		Name (CRS, ResourceTemplate () {
 			IRQNoFlags (IR1) {}
@@ -188,7 +188,7 @@ Device (SUPERIO_ID(PS2, SUPERIO_KBC_PS2LDN)) {
 		PNP_DEFAULT_PSC
 	}
 
-	Method (_CRS)
+	Method (_CRS, 0, Serialized)
 	{
 		Name (CRS, ResourceTemplate () {
 			IRQNoFlags (IR1) {}
diff --git a/src/superio/acpi/pnp_uart.asl b/src/superio/acpi/pnp_uart.asl
index 1bbdb37fa6..f42cc42039 100644
--- a/src/superio/acpi/pnp_uart.asl
+++ b/src/superio/acpi/pnp_uart.asl
@@ -79,7 +79,7 @@ Device (SUPERIO_ID(SER, SUPERIO_UART_LDN)) {
 	}
 #endif
 
-	Method (_CRS)
+	Method (_CRS, 0, Serialized)
 	{
 		Name (CRS, ResourceTemplate () {
 			IO (Decode16, 0x0000, 0x0000, 0x08, 0x08, IO0)