diff --git a/src/mainboard/ocp/deltalake/devicetree.cb b/src/mainboard/ocp/deltalake/devicetree.cb
index 2586b73ea7..f1b201d5f4 100644
--- a/src/mainboard/ocp/deltalake/devicetree.cb
+++ b/src/mainboard/ocp/deltalake/devicetree.cb
@@ -36,6 +36,7 @@ chip soc/intel/xeon_sp/cpx
 	register "coherency_support" = "0"
 	register "ats_support" = "0"
 
+	register "gen1_dec" = "0x00fc0601" # BIC in-band update support
 	register "gen2_dec" = "0x000c0ca1" # IPMI KCS
 
 	device cpu_cluster 0 on