diff --git a/src/mpdu.h b/src/mpdu.h
index f6f19744..cf3114db 100644
--- a/src/mpdu.h
+++ b/src/mpdu.h
@@ -231,6 +231,7 @@ enum mmpdu_status_code {
 	MMPDU_STATUS_CODE_ENABLEMENT_DENIED = 105,
 	MMPDU_STATUS_CODE_RESTRICT_AUTH_GDB = 106,
 	MMPDU_STATUS_CODE_AUTHORIZATION_DEENABLED = 107,
+	MMPDU_STATUS_CODE_UNKNOWN_PASSWORD_IDENTIFIER = 123,
 	MMPDU_STATUS_CODE_SAE_HASH_TO_ELEMENT = 126,
 	MMPDU_STATUS_CODE_SAE_PK = 127,
 };