diff --git a/src/soc/intel/broadwell/finalize.c b/src/soc/intel/broadwell/finalize.c
index b4c2031479..219d62d45a 100644
--- a/src/soc/intel/broadwell/finalize.c
+++ b/src/soc/intel/broadwell/finalize.c
@@ -51,6 +51,9 @@ const struct reg_script system_agent_finalize_script[] = {
 	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x6800, 1 << 31),
 	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x7000, 1 << 31),
 	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x77fc, 1 << 0),
+	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x50fc, 0x8f),
+	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x7ffc, 1 << 0),
+	REG_MMIO_OR32(MCH_BASE_ADDRESS + 0x5880, 1 << 5),
 	REG_MMIO_WRITE8(MCH_BASE_ADDRESS + 0x50fc, 0x8f),	/* MC */
 
 	REG_SCRIPT_END