diff --git a/lib/krb5/krb5.h b/lib/krb5/krb5.h
index 856ece534..0c247ec80 100644
--- a/lib/krb5/krb5.h
+++ b/lib/krb5/krb5.h
@@ -217,6 +217,8 @@ typedef enum krb5_key_usage {
     /* Encryption key usage used in the digest encryption field */
     KRB5_KU_DIGEST_OPAQUE = -19,
     /* Checksum key usage used in the digest opaque field */
+    KRB5_KU_KRB5SIGNEDPATH = -21
+    /* Checksum key usage on KRB5SignedPath */
 } krb5_key_usage;
 
 typedef krb5_key_usage krb5_keyusage;