diff --git a/src/soc/intel/common/block/tcss/tcss.c b/src/soc/intel/common/block/tcss/tcss.c
index a0cd733ad7..df331c2abe 100644
--- a/src/soc/intel/common/block/tcss/tcss.c
+++ b/src/soc/intel/common/block/tcss/tcss.c
@@ -439,8 +439,3 @@ bool tcss_valid_tbt_auth(void)
 {
 	return REGBAR32(PID_IOM, IOM_CSME_IMR_TBT_STATUS) & TBT_VALID_AUTHENTICATION;
 }
-
-bool ioe_tcss_valid_tbt_auth(void)
-{
-	return ioe_p2sb_sbi_read(PID_IOM, IOM_CSME_IMR_TBT_STATUS) & TBT_VALID_AUTHENTICATION;
-}