diff --git a/src/mainboard/siemens/mc_ehl/variants/mc_ehl1/devicetree.cb b/src/mainboard/siemens/mc_ehl/variants/mc_ehl1/devicetree.cb
index 319a843722..82070785fc 100644
--- a/src/mainboard/siemens/mc_ehl/variants/mc_ehl1/devicetree.cb
+++ b/src/mainboard/siemens/mc_ehl/variants/mc_ehl1/devicetree.cb
@@ -82,6 +82,7 @@ chip soc/intel/elkhartlake
 	register "SataPortsEnable[1]" = "1"
 	register "SataPortsDevSlp[0]" = "0"
 	register "SataPortsDevSlp[1]" = "0"
+	register "SataSpeed" = "SATA_GEN2"
 
 	register "ScsEmmcHs400Enabled" = "0"
 	register "ScsEmmcDdr50Enabled" = "1"