diff --git a/lib/krb5/rd_req.c b/lib/krb5/rd_req.c
index 6460aa919..6b52cf97c 100644
--- a/lib/krb5/rd_req.c
+++ b/lib/krb5/rd_req.c
@@ -177,7 +177,7 @@ find_etypelist(krb5_context context,
     krb5_authdata adIfRelevant;
     unsigned i;
 
-    krb5_data_zero(&adIfRelevant);
+    memset(&adIfRelevant, 0, sizeof(adIfRelevant));
 
     etypes->len = 0;
     etypes->val = NULL;