diff --git a/lib/krb5/krb5.h b/lib/krb5/krb5.h
index 712fd095c..3528ff4f9 100644
--- a/lib/krb5/krb5.h
+++ b/lib/krb5/krb5.h
@@ -225,6 +225,8 @@ typedef enum krb5_key_usage {
     /* Keyusage for the server referral in a TGS req */
     KRB5_KU_SAM_ENC_NONCE_SAD = 27,
     /* Encryption of the SAM-NONCE-OR-SAD field */
+    KRB5_KU_PA_PKINIT_KX = 44,
+    /* Encryption type of the kdc session contribution in pk-init */
     KRB5_KU_DIGEST_ENCRYPT = -18,
     /* Encryption key usage used in the digest encryption field */
     KRB5_KU_DIGEST_OPAQUE = -19,