diff --git a/lib/krb5/krb5.h b/lib/krb5/krb5.h
index 87b1386f1..0d560470c 100644
--- a/lib/krb5/krb5.h
+++ b/lib/krb5/krb5.h
@@ -851,6 +851,11 @@ krb5_string_to_key (char *str,
 		    krb5_data *salt,
 		    krb5_keyblock *key);
 
+krb5_error_code
+krb5_string_to_key_data (krb5_data *str,
+			 krb5_data *salt,
+			 krb5_keyblock *key);
+
 krb5_error_code
 krb5_get_salt (krb5_principal princ,
 	       krb5_data *salt);