diff --git a/src/mainboard/intel/adlrvp/variants/adlrvp_p_ext_ec/overridetree.cb b/src/mainboard/intel/adlrvp/variants/adlrvp_p_ext_ec/overridetree.cb
index 544f9e251b..fc4c11c496 100644
--- a/src/mainboard/intel/adlrvp/variants/adlrvp_p_ext_ec/overridetree.cb
+++ b/src/mainboard/intel/adlrvp/variants/adlrvp_p_ext_ec/overridetree.cb
@@ -70,6 +70,7 @@ chip soc/intel/alderlake
 				register "srcclk_pin" = "5"
 				register "ext_pm_support" = "ACPI_PCIE_RP_EMIT_ALL"
 				register "skip_on_off_support" = "true"
+				register "use_rp_mutex" = "true"
 				device generic 0 alias rp6_rtd3 on
 				end
 			end
diff --git a/src/mainboard/intel/adlrvp/variants/adlrvp_rpl_ext_ec/overridetree.cb b/src/mainboard/intel/adlrvp/variants/adlrvp_rpl_ext_ec/overridetree.cb
index 544f9e251b..fc4c11c496 100644
--- a/src/mainboard/intel/adlrvp/variants/adlrvp_rpl_ext_ec/overridetree.cb
+++ b/src/mainboard/intel/adlrvp/variants/adlrvp_rpl_ext_ec/overridetree.cb
@@ -70,6 +70,7 @@ chip soc/intel/alderlake
 				register "srcclk_pin" = "5"
 				register "ext_pm_support" = "ACPI_PCIE_RP_EMIT_ALL"
 				register "skip_on_off_support" = "true"
+				register "use_rp_mutex" = "true"
 				device generic 0 alias rp6_rtd3 on
 				end
 			end