diff --git a/src/mainboard/siemens/mc_rpl/devicetree.cb b/src/mainboard/siemens/mc_rpl/devicetree.cb
index 35a09f3a5e..5477b4697a 100644
--- a/src/mainboard/siemens/mc_rpl/devicetree.cb
+++ b/src/mainboard/siemens/mc_rpl/devicetree.cb
@@ -13,6 +13,8 @@ chip soc/intel/alderlake
 	# Sagv Configuration
 	register "sagv" = "SaGv_Disabled"
 
+	register "eist_enable" = "false"
+
 	register "dptf_enable" = "false"
 
 	register "s0ix_enable" = "false"
diff --git a/src/mainboard/siemens/mc_rpl/mainboard.c b/src/mainboard/siemens/mc_rpl/mainboard.c
index 28068395c0..a96ab859cd 100644
--- a/src/mainboard/siemens/mc_rpl/mainboard.c
+++ b/src/mainboard/siemens/mc_rpl/mainboard.c
@@ -93,6 +93,7 @@ enum cb_err mainboard_get_mac_address(struct device *dev, uint8_t mac[MAC_ADDR_L
 
 void mainboard_silicon_init_params(FSP_S_CONFIG *params)
 {
+	params->Eist = 0;
 	params->TurboMode = 0;
 }