diff --git a/kdc/kdc.h b/kdc/kdc.h
index 31ab622c3..c3833db79 100644
--- a/kdc/kdc.h
+++ b/kdc/kdc.h
@@ -80,6 +80,8 @@ typedef struct krb5_kdc_configuration {
 
     int pkinit_dh_min_bits;
 
+    int enable_digest;
+
 } krb5_kdc_configuration;
 
 #include <kdc-protos.h>