diff --git a/src/soc/amd/stoneyridge/fw_st.cfg b/src/soc/amd/stoneyridge/fw_st.cfg
index 049242b337..deb49b69d0 100644
--- a/src/soc/amd/stoneyridge/fw_st.cfg
+++ b/src/soc/amd/stoneyridge/fw_st.cfg
@@ -10,7 +10,7 @@ PSPBTLDR_FILE          PspBootLoader_prod_ST.sbin
 PSP_SMUFW1_SUB0_FILE   SmuFirmware_ST.csbin
 PSP_SMUFW1_SUB1_FILE   SmuFirmware_ST_FN.csbin
 PSP_SMUFW2_SUB0_FILE   SmuFirmware2_prod_ST.csbin
-PSP_SMUFW2_SUB1_FILE   SmuFirmware2_prod_ST_FN.sbin
+PSP_SMUFW2_SUB1_FILE   SmuFirmware2_prod_ST_FN.csbin
 PSPRCVR_FILE           PspRecoveryBootLoader_prod_ST.sbin
 PUBSIGNEDKEY_FILE      RtmPubSignedST.key
 PSPNVRAM_FILE          PspNvramST.bin