diff --git a/kdc/kdc.h b/kdc/kdc.h
index bf65ab1d2..a598f818a 100644
--- a/kdc/kdc.h
+++ b/kdc/kdc.h
@@ -81,6 +81,8 @@ typedef struct krb5_kdc_configuration {
     int pkinit_dh_min_bits;
 
     int enable_digest;
+    int digests_allowed;
+
     size_t max_datagram_reply_length;
 
 } krb5_kdc_configuration;